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Thread: Hypermiling (Getting unbelievable mileage on Petrol)

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    Default Hypermiling (Getting unbelievable mileage on Petrol)

    Hypermiling
    So basically ever since I posted the snaps/videos of getting 22.8 Kilometers/L and then 23.6 KPL I really think its time to share some of the driving habits I carry with me and learn about your driving habits too and see how we can all get the best mileage we can get from our cars and save a lot of fuel and money.

    How much saving are we looking at?
    Some people may think that the money we'll save this way is so less that its almost irrelevant. Its actually just the opposite. You can save yourself up to 50,000 Rupees a year if you're a good hypermiler (that's like buying a CNG kit every year!)

    If you're really good, you can get Petrol mileage which costs you even less as compared to CNG.

    There are hypermiling contests that take place in the west. People who win that contest have got up to 106 Miles per gallon (45 Kilometers per liter!!) at the end of the contest.

    Some hypermiliers in their daily routine get up to 21 Kilometers per liter in Honda Accord (I have a video of a person who gets this average that I will share) -- that's twice of what Honda Promises.

    My experience of Hypermiling is only with Petrol. But I am almost 60% sure that all these techniques do apply to CNG as well. So yes, you can also get phenomenal fuel averages regardless of which fuel you are running.

    Modify yourself, not your car
    As a hypermilier you must understand that there isn't alot you can do with your car that will save fuel, besides removing some useless load from it and checking tire pressure. The actual modification is in your own driving habbit, I'll explain what I mean by this below:

    How we do it

    If you have a 'real time fuel consumption graph' you will see that the most fuel is burnt when you are accelerating. In Honda City and the new XLi/GLi these things come in built from the factory (you can suggest more cars if you have in mind and I will add them in the list which do have these small gadgets). For a hypermiler these are a 'must have' If your car didn't come with one, you can purchase one that plugs into the OBD port and gives you the milage you're getting.

    Alternately you can carry 2 - 3 liters of petrol in a bottle and calculate average by emptying the tank.

    1. Manual Transmission is the best
    If you're going to Hypermile, you will want to try doing this preferably on a manual transmission car, one with a clutch. Manuals will get you a better average as compared to an automatic one.

    2. Slower acceleration

    The basic idea is to drive calm, less aggressive. If you're going to accelerate, do it slowly. I personally shift gears on 2000 RPM. Accelerating "too slowly" could also hurt your gas mileage. So I think the ideal revs to shift would be 2000.

    In an Automatic car, you should try to maintain RPM at 2000 and leave the rest on the car.

    3. Coasting
    You guys must have heard about 'gliding.' Gliding is something when the aeroplanes are flying but their engine's aren't working, or perhaps they don't have one.

    In cars, this phenomenon is called "coasting." In a MT car (Manual Transmission) you can put the car in neutral when you're not wanting to accelerate and that would be coasting for you.

    4. Drive like you're riding a bicycle
    This really really explains the fuel saving in car. Think as if you're on a bicycle. If you have to immediately go from zero to 20 kilometers per hour in a bicycle, you know that you will get tired very quickly because you'll have to give a lot of energy to it.

    Think of "energy" as "fuel" when thinking about car.

    But if you have to go from zero to 20 in, say, 10 minutes? You will reach that speed and still be fresh (meaning you will have lost lesser energy and reached that speed too).

    That's the same way it is with cars. If you're going to accelerate and do it slowly, you will save fuel and energy and still reach a particular speed.

    5. Avoid Breaks
    Remember that every time you are pushing the accelerator or your'e pushing the breaks, you're wasting fuel.

    When the car is 'coasting' and you hit breaks, you are actually loosing all the potential energy that your car has which is later going to cost you fuel when you want it back.

    6. Looking as far as you can
    As a hypermiler, you're going to want to look as far ahead on the road as you can. If you can see a red light at about 400 meters from you, you don't have to race to that point and then abruptly hit breaks. In Pakistan a lot of times there are road blocks, what most people do is that they hit breaks and stop one inch before the blocks (which reduces the probability of clearing of the road block).

    If you can see you're going to have to stop in about 500 meters, what you do is put the car in neutral and let it coast all the way for you. When the car is in neutral and its coasting/gliding, the average you're getting is about 50 - 60 kilometers per liter. This puts a big impact on the overall average of your car.

    I do this every time I reach a toll plaza on the motor way. People sometimes get passed by me at high speeds and then break right in front of the lane. Since I am slow, I get the chance to choose the lane that has the least amount of traffic in it.

    7. Drive below speed limit
    Within the city the speed limit generally is around 60 Km/h, and on the highway its 100 Kph, and on motor way its 120.

    I drive at between 90 - 100 on Motorway and easily get 22 KPL at the end of the journey.

    Lets us see if this speed really wastes a lot of time.

    The distance from the Peshawar toll plaza to Rawalpindi toll plaza is about 151 Kilometers. If you're driving on 120, you'll get an average of 16 KM/L. Basically there is a huge drop in average as soon as you go above 105 KM/H (I don't know why).

    Now, if your'e driving at 120 KM/H and you have to travel a distance of 151 KMs, you will do that in:
    Code:
    151/120 x 60 = 75 Minutes
    If you travel the same distance in 100 Kilometers/H the difference would be:

    Code:
    151/100 x 60 = 90 Minutes
    That's just a difference of 15 minutes? Not at all a huge difference? Right? For just the difference of 15 minutes in a 1.5 hour journey, you can save yourself up to 400 rupees per trip.

    So there is just a psychological effect in driving slow. People may over take you a lot of times and you may feel "Arrrggg!!" in the begging, but this feeling ends up as soon as you see the savings you're making. I personally have started feeling uneasy with 120 Km/h. I feel the most comfortable when I am at 90.

    As I wrote, its all about changing 'driving' habits. This is one of them.

    Slower speeds are much safer. You're almost completely in control of your car. Above 120, you really don't know what you're doing. If anything comes in front of you, even with ABS its going to take a while for the car to stop. At 90, it will be much more safe and easy to drive.

    Driving below speed limit also saves you from getting a chalan on the motorway. And best of all, its 'Good for the Engine." Making your engine cry on every trip probably will cost its life at the end of 200,000 Kilometers. But going slow really gives the time for the engine to breath and not over heat etc.

    The theory is that the less you push it, the happier it will be.

    8. You don't have to necessarily turn off the AC
    If the weather is not that bad, cloudy, or you're driving at early morning or evening, I think it is not difficult to drive without AC. Turning on the fan and setting it to fresh air mode should do it for you.

    But if you're driving in the middle of the day, you shouldn't turn off the AC. It does consume fuel but hypermiling is also about remaining as practical as one can be.

    What I personally do is that I put the fan speed to 4 for the first 10 minutes, and then immediately put it to 1 with AC on. When the fan is on 1x, it makes the AC trip a lot more often as compared to higher fan speeds. This keeps the temperature of the car reasonable and you can go ahead with the hypermiling as well.

    Remember it is always the best to close the windows and open it only when it is absolutely necessary. Turn on the AC if you want cold air or use the fan in the fresh air mode. Opening the windows increases drag that you would really want to reduce.

    9. Loose useless weight
    Sometimes there is some luggage inside your trunk that you haven't noticed. Its always the best to remove all the unnecessary stuff from the car.

    Also remember that if you've got yourself a CNG kit, you should try hypermiling WITH CNG and not with Petrol because the cylinder that you have in the trunk is 'heavy' and you're not really going to save alot with that thing still inside the car.


    10. Use factory settings for your car
    The more you modify your car, the more fuel you loose. Putting huge alloys, useless air intake and air filters, spoilers etc. All of these things will hurt your fuel average. Try your best to leave the car on factory settings for the longest possible time.

    My car has 100% factory tires with factory rims. I haven't got it tuned from any one besides changing the oil etc. I didn't let any body touch any other setting in the engine.

    12. Change Air Filter/Engine Oil/Oil filter on time
    Air filter specifically helps. Although when I got 22.8 KPL I had not changed any of these things in the past 5000 kilometers. But when I did, I got 23.6 KPL. So surely these things help. Make sure you change Air filter every 6 months. It does not hurt the savings. On petrol its normal to change Engine oil/oil filter after 6000 kilometers. Don't be miser about putting the best Engine oil out there.

    13. Maintain the momentum
    Another thing you would want to do is maintain the momentum. This is very important and effects about 30% of your fuel efficency. Accelerating and decelerating again and again is a very bad habit of driving. Try to maintain a particular speed for the longest possible time. Again consider cycling. If you're on 20 KM/H on cycling, you're hardly pushing the pedals but the cycle is going at a nice speed. Same goes for cars, they will drink very less fuel and save a lot of money for you.

    14. Some extreme hypermiling techniques that I don't recommend:
    Some crazy hypermilers go to extreme with saving fuel and do a few things that are not advisable to everyone. Only the most experienced people should practice these.

    These include putting more air in your tires than usual. This reduces the drag on the tire.

    Drafting behind bigger trucks. Some trucks on the motor way are going at 100 KPH. Drafting behind them does safe fuel. When you drive behind them, the resistance of the air that your car faces when there is no one in front of it is gone because then the truck will face that resistance and you're car will have to put less effort to drive.

    Thirdly, some extreme hypermilers turn off the engine when they are going on a down stream. Obviously when the car is off and you're going down stream, you are getting infinite kilometers per liter. But this is not at all recommended by me. May be you guys could do some research on this on your own and come back with the results and share it here.

    Some people even remove the spare tire to reduce weight.. again this is one of the extreme steps.

    ===========================================
    This is all I can think of for now. Please do come with your findings and let us all know how much you've saved. I'll be posting a video as well about hypermilers and their interviews momentarily.

    Say to the believing men.. www.muhammadbinyusrat.com/blog/

  2. #301
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    very nice example of bicycle,helps in getting the idea.

    also turn off enginge instead of idling at redlights.

    but never ever ever turn off engine while the car is running.

    it has two major dangers.

    1.You might turn over the key to steering lock position and steering will lock in an event of emergengy maneuver.

    2.while the engine is turned off,the break system of some cars does not work on full potential.(to chek this,let the car glide on a slight slope At NEAR ZERO SPEED and apply brakes 2,3 times,and feel the difference of brake grip.the break loosens due to hydraulic system not working and its only foot pressure that works.
    my gli 2010 is equipped with brake assist.it happens like this and its also mentioned in the manual.
    please share the result of other cars.

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    informative i used to do same techniques in winter when there was no pressure of cng to save cng n petrol both
    Levels are not achievd but levels are created...

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    fuel injector cleaning also improves mileage,if driving on petrol.

    never clean them with additives.

    ultrasonic cleaning while injector removed is the only best way with NO side effects.(available in LHR only)
    recommended after 40k kms.

    and the quality if fuel also matters alot.

    the octane rating we get here in pk is less than those internationally available petrol have,

    in pk, i ve heard and experienced that the quality of company operated pso pumps is quiet better than the rest.

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    Quote Originally Posted by skyrct View Post
    fuel injector cleaning also improves mileage,if driving on petrol.

    never clean them with additives.

    ultrasonic cleaning while injector removed is the only best way with NO side effects.(available in LHR only)
    recommended after 40k kms.

    and the quality if fuel also matters alot.

    the octane rating we get here in pk is less than those internationally available petrol have,

    in pk, i ve heard and experienced that the quality of company operated pso pumps is quiet better than the rest.
    Where is this ultrasonic cleaning available in Lahore??


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    bump in public interest
    My dear ALLAH when I loose hope, help me to remember that Your love is greater than my disappointment and Your plans for my life are better than my Dreams.

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    Update: Drafting trucks improves my mileage by up to 50%. Its just little difficult to find appropriate vehicle to draft behind.

    But as soon as I begin drafting, if the mileage is at 19, it shoots up to 21 within less than a minute.

    I think aerodynamics play a very vital role in the mileage of a car.. so in my limited knowledge, one reason why SUVs have a bad petrol mileage is because they are generally shaped very.. how do I put it.. "unaerodynamically?"
    Say to the believing men.. www.muhammadbinyusrat.com/blog/

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    nice thread
    read the first post
    so can we do this hypermilling on prosmatic civic 04 whether petrol or cng?
    also since its auto so does coasting technique can be used or not,i really have no idea if i should make it neutral while running on road n then back to Drive mode.
    Rest i have habit of extreme heavy foot but till i reach 80 then maintain and usually drive it slow.

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    Default Engine oil change

    I have Honda City 2007 automatic. i had been using havoline 20w50 for quite some time now.i wanted to ask that what does that mean 20w50 and when should i get my oil change ( i mean after how many kilometers normally with this havoline 20w50)?

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    hello hello


    WHAT I RECOMMMEND FOR automatic cars is

    BUY ALTIS AUTO
    on 100 kmph

    put it on cruise control

    lets computer help u save fuel and money

    in manual poster is very clear

    THANX FOR REMINDING BRO

    i myself like cruising at 90 100

    so i am happy wid my gli 1.6

    reducing weight includes

    mostly interior parts for sho sha

    dont remove spare tire tools or car lifter jck

    altis wqith 6 speed is also roking
    REGARDS
    I am not a MOD.... And am proud of that....

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    nice tip but not every car has cruise control
    + you can use that only on motorways not within city

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    Quote Originally Posted by chaudhary9 View Post
    nice thread
    read the first post
    so can we do this hypermilling on prosmatic civic 04 whether petrol or cng?
    also since its auto so does coasting technique can be used or not,i really have no idea if i should make it neutral while running on road n then back to Drive mode.
    Rest i have habit of extreme heavy foot but till i reach 80 then maintain and usually drive it slow.
    I did try shifting a 02 prosmatic/orial to neutral and back to drive while driving once. It didn't give any jerk or anything like that.

    My own car is automatic, I keep shifting to drive and back to neutral all day. It does cause a jerk if I am at 80, but below 60 its never a problem AND my gearbox isn't the best.

    Remember that your car wastes the MOST fuel when accelerating or breaking.. so you'll definitely have to work on your 'heavy foot till reaching 80' part.
    Say to the believing men.. www.muhammadbinyusrat.com/blog/

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    Quote Originally Posted by chaudhary9 View Post
    nice thread
    read the first post
    so can we do this hypermilling on prosmatic civic 04 whether petrol or cng?
    also since its auto so does coasting technique can be used or not,i really have no idea if i should make it neutral while running on road n then back to Drive mode.
    Rest i have habit of extreme heavy foot but till i reach 80 then maintain and usually drive it slow.
    Quote Originally Posted by BilalYusrat View Post
    I did try shifting a 02 prosmatic/orial to neutral and back to drive while driving once. It didn't give any jerk or anything like that.

    My own car is automatic, I keep shifting to drive and back to neutral all day. It does cause a jerk if I am at 80, but below 60 its never a problem AND my gearbox isn't the best.

    Remember that your car wastes the MOST fuel when accelerating or breaking.. so you'll definitely have to work on your 'heavy foot till reaching 80' part.

    bro i have a query here. woudnt the wear n tear of the gear box outweight the fuel saved??? i reckon its a 5:1 in not putting your auto gear in nuetral over the fuel saving cost.
    'RESPECT',DIY projects: 1) 'CRUISEMATEC' 1st PKDM 8th Gen Civic with OEM Honda CRUISE CONTROL 2)Steering Audio Controls 3)AUX for OEM 8th Gen 6 CD CHANGER 4)Leather RED H logo!

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    now tell me one thing how can u achieve hyper millage in Peshawar rash traffic first u deal with Uni road and taxi drivers then there are 100000 check points in saddar
    Hanjiii Kaa Storeey Eehh !

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    Quote Originally Posted by BilalYusrat View Post
    I did try shifting a 02 prosmatic/orial to neutral and back to drive while driving once. It didn't give any jerk or anything like that.

    My own car is automatic, I keep shifting to drive and back to neutral all day. It does cause a jerk if I am at 80, but below 60 its never a problem AND my gearbox isn't the best.

    Remember that your car wastes the MOST fuel when accelerating or breaking.. so you'll definitely have to work on your 'heavy foot till reaching 80' part.
    i got the civc just 3 days back
    since its lower car,so i almost stop it all the holes,speed breaker,etc esp the U turns,our awam just cant wait,so i guess em burning alot of fuel,also i noticed heavy foot doesnt helps in speed up unless i reach 30-40 (on CNG)

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    Quote Originally Posted by zunny View Post
    bro i have a query here. woudnt the wear n tear of the gear box outweight the fuel saved??? i reckon its a 5:1 in not putting your auto gear in nuetral over the fuel saving cost.
    Yes, provided it does cause the gearbox to break. I think automatic transmission is a very sophisticated and advanced piece of equipment and should... "should" not be silly enough to break the transmission if someone shifts to neutral and back to drive.

    What happens if you put your car in reverse while driving? Does it shift to reverse?
    Say to the believing men.. www.muhammadbinyusrat.com/blog/

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    Very nice and informative thread.. I never knew about HYPERMILLING, but i was using most of the techniques (exceppt the extreme techniques).. When i read this thread i was sad that i cannot further increase my fuel average :-(, but am glad that i have been a HYPERMILLER for last 10years.. i drive in karachi city area and my car is XLI 2004 and below is the average i regularly get

    CNG 17-19KM/KG (without a/c)
    CNG 16-18km/kg (with a/c)

    I used to tell this to ppl and they never believed me

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    Quote Originally Posted by asimm76 View Post
    Very nice and informative thread.. I never knew about HYPERMILLING, but i was using most of the techniques (exceppt the extreme techniques).. When i read this thread i was sad that i cannot further increase my fuel average :-(, but am glad that i have been a HYPERMILLER for last 10years.. i drive in karachi city area and my car is XLI 2004 and below is the average i regularly get

    CNG 17-19KM/KG (without a/c)
    CNG 16-18km/kg (with a/c)

    I used to tell this to ppl and they never believed me
    A brother on Pakwheels (I think his screen name is qwertypoiu) gets 250 Km/Cylinder highway, and 200 local in his XLi.. So your figures make up about 160 Km/Cylinder, which is pretty normal I guess.
    Say to the believing men.. www.muhammadbinyusrat.com/blog/

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    Hypermiling is a nice concept... in places where u do not have to constantly consider the traffic on ur left, right and sometimes above (kidding). it works best on highways. inside the cities, with the kind of traffic we have, it is totally useless as brakes need to be applied all the times.
    add/like my page http://www.facebook.com/pages/Deep-Stage/118781821626401

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    Retaliator's Avatar
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    shifting an automatic car into neutral when it is moving is dangerous for the transmission. thats what i meant. it wears off the thin clutch plates in the automatic transmission and u can have a transmission failure
    -

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    Quote Originally Posted by Retaliator View Post
    shifting an automatic car into neutral when it is moving is dangerous for the transmission. thats what i meant. it wears off the thin clutch plates in the automatic transmission and u can have a transmission failure
    i thought it would help us saving some fuel?
    So the point is, we must not shift to Neutral when going downhill right?
    im practicing extreeme hypermiling so just asking to make sure..
    beating my current record for number of consecutive days alive

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