Hypermiling (Getting unbelievable mileage on Petrol)

[hdaackda]

Actually, running the car on pure acetone will give you about 565 mpg (over 1176.3 mpg if you are the world champion), and will make you independent of mere mortals who are dependent on mere petrol.

And i thnk aftr 565 miles, u wont b able to run ur car at all!

[VCheng]

And i thnk aftr 565 miles, u wont b able to run ur car at all!

You think correctly. Acetone will destroy a lot of rubber and plastic parts in the fuel delivery system. Acetone should NOT be used as a fuel additive.

[muhaqpk]

I have recently purchased Toyota Corolla GLI and driven it about 1300km within Lahore. Presently I am getting an average of 15.7 km/L(wth A/C). My driving speed is mostly between 50 to 80 km/hr and I try to keep it in fourth or fifth gear as far as possible. I accelerate slowly and avoid sudden braking keeping a safe distance from the vehicle ahead. I expect this mileage to improve after driving 5 to 10 thousand kilometers.Previously I had Corolla XLI 2004 on CNG but the drive of new Corolla is much quieter and it is more stable on the road. Brakes(ABS) are very good as compared to the previous corolla.

[hdaackda]

You think correctly. Acetone will destroy a lot of rubber and plastic parts in the fuel delivery system. Acetone should NOT be used as a fuel additive.

thanks for the clarification

[BilalYusrat]

I have recently purchased Toyota Corolla GLI and driven it about 1300km within Lahore. Presently I am getting an average of 15.7 km/L(wth A/C). My driving speed is mostly between 50 to 80 km/hr and I try to keep it in fourth or fifth gear as far as possible. I accelerate slowly and avoid sudden braking keeping a safe distance from the vehicle ahead. I expect this mileage to improve after driving 5 to 10 thousand kilometers.Previously I had Corolla XLI 2004 on CNG but the drive of new Corolla is much quieter and it is more stable on the road. Brakes(ABS) are very good as compared to the previous corolla.

16 kilometers/Liter within Lahore (i-e local average) is excellent! Its just brilliant! I get between 15 - 19 on the average. By average I mean the calculation done upon each refill.

You can surely get 20 on the highway if you keep your current habits of driving.

[nadeem5476]

Nice fuel saving tips. Many of them I was already following and learned new things like drafting.

My car is also on original tuning since 2005 on Petrol and since 2008 on CNG. Getting 200-250 kms in 56Kg Cylinder on motorway and 170-180 Kms in city drive on an Xli which most people do not believe.

But our fellow Pakistani drivers think it an insult if someone overtakes them and yes they would love to leap to red light and then break hard and then say, how come your 1.3 liter car gives such a milage?

are you sure it was 200-250 ? i thought it is 2000 - 2500

[trankulizer]

Thirdly, some extreme hypermilers turn off the engine when they are going on a down stream.

Well this one is just crazy!! The power steering n brakes wont work when u need em n u will end up dieing tryin to save alil fuel!! Aahahahhaha

[BilalYusrat]

are you sure it was 200-250 ? i thought it is 2000 - 2500

A friend of mine who happens to live with me got 192 kilometers in one cylinder in local. So getting 200 is pretty much doable. I'm sure he can make 250 on the high way.

[accord7362]

@bilal bohat allla Khush rahooo

& very true 20 to 25km/L is very achievable with your tips

gr8 info

[murtazee]

gr8 info shared Bilal

[c123pk]

Thirdly, some extreme hypermilers turn off the engine when they are going on a down stream.

Well this one is just crazy!! The power steering n brakes wont work when u need em n u will end up dieing tryin to save alil fuel!! Aahahahhaha

Mehran's Brakes and Steering both will work so i gas its ok for a makran to come downhill at full speed

[c123pk]

Tell me is it ok or bad ?

Car : City vario
Load : 5 people
Airconditioning : Full time.
Distance Travelled : 1050 kms approx.
Fuel (Regular) filled : Rs. 4,500. (67 liters)

[BilalYusrat]

Tell me is it ok or bad ?

Car : City vario
Load : 5 people
Airconditioning : Full time.
Distance Travelled : 1050 kms approx.
Fuel (Regular) filled : Rs. 4,500.

For each 500 rupees of fuel, you should assume your car got 120 - 140 Kilometers. If you get 130 Kilometers per 500 rupees of Fuel, its like getting 17.5 Km/L which is good.

Your average is about 116 Kilometers/500 Rupees of Petrol. This is 16 Kilometers/Liter. Which is not very bad. I assume your average speed would have been 120 on the highway or mostly it was driven in local.

The average is ok for both these cases. If you drive at 120, or drive at local, you get the same average.

[c123pk]

For each 500 rupees of fuel, you should assume your car got 120 - 140 Kilometers. If you get 130 Kilometers per 500 rupees of Fuel, its like getting 17.5 Km/L which is good.

Your average is about 116 Kilometers/500 Rupees of Petrol. This is 16 Kilometers/Liter. Which is not very bad. I assume your average speed would have been 120 on the highway or mostly it was driven in local.

The average is ok for both these cases. If you drive at 120, or drive at local, you get the same average.

This was on Highway and the speed was in between 80 - 110 km/h.

But locally in Karachi city i get a lot less average about 10 - 11 kms with Airconditioning which i think is ok because of the A/T and the stop n go stop n go driving conditions.

[tauseef]

i disagree with the whole shutting off engine. thats abit too extreme and ruins the whole driving fun.

[unikorn]

Thanks Bilal for sharing such nice information which is very beneficial for all of us. I have a couple of questions regarding the topic. I hope you will be able to answer them.

1. While 'coasting', if we use clutch instead of bringing the car to neutral, would it serve the purpose or is there any negative side to that?

2. Is there any cost to 'deceleration' at the expense of the fuel? What I mean to ask is that while going downhill, if we use engine inertia to decelerate, would it burn the fuel or not? Because it is burning the minimal fuel anyway while keeping the vehicle on. Does the process of releasing the clutch at high speed while putting the car in appropriate gear to decelerate the car increases the intake of fuel or does it remain at the same minimal level?

[turbo_charge]

Very informative thread indeed... One can also do the same for a motor bike as well....

[laparwah]

quite informative , cheers

[BilalYusrat]

Thanks Bilal for sharing such nice information which is very beneficial for all of us. I have a couple of questions regarding the topic. I hope you will be able to answer them.

1. While 'coasting', if we use clutch instead of bringing the car to neutral, would it serve the purpose or is there any negative side to that?

2. Is there any cost to 'deceleration' at the expense of the fuel? What I mean to ask is that while going downhill, if we use engine inertia to decelerate, would it burn the fuel or not? Because it is burning the minimal fuel anyway while keeping the vehicle on. Does the process of releasing the clutch at high speed while putting the car in appropriate gear to decelerate the car increases the intake of fuel or does it remain at the same minimal level?

Pressing Clutch a lot is definitely bad for the health of a clutch plate. I am pretty sure this statement stands true for most of the cars, I don't know the technical reasons for it, but I've heard it from a lot of people. I think its best to keep the clutch pressed for the least amount of time. However, if this can be confirmed that its not bad for the clutch plate, then its technically same to coast using the clutch. But its also a little difficult to keep pressing the clutch for a longer time instead of shifting to neutral and releasing it.

To decelerate by releasing the accelerator is pretty much same as putting it in neutral and hitting the breaks, or just hitting the breaks while still the car is in gear. Basically, you have to 'anticipate' well deceleration before time. So that instead of using the breaks, you can coast to the point where you intend to stop.

[unikorn]

Thanks for the clarification Bilal. My second question pertains to downhill or slopes because there, you sometimes need to slowdown to keep a check on speed.