Vitz 1.3 Fuel Consumption

[pwuser158773315273]

For a few months, I have had 2005 model Vitz genuine 1.3, 4 cylinders car with speedometer and rpm meter. It's pick, ride and handling is marvelous. I get it maintained regularly in terms of oil, filters etc. I use 20-40 synthetic motor oil. However I am facing two issues.
1. It gives me 8 to 10 km per litre with AC. Without AC, it gives 10. I can't afford it. Is it sensor issue or something else?
2. I got its AC gas filled, but in 2 to 3 months, on checking, it was found that its gas had vanished despite there wasn't any leakage in the pipes. Is the AC compressor malfunctioning or is there any other reason? Kindly guide me. Thanks.

[omaruser156370259465]

It must be the 2SZ FE motor, to increase the average, do some throttle cleaning, get catalytic converter cleaned, spark plugs cleaning, get some petrol from a good pump thats company operated, the appropriate tire pressure in all 4, do some overall and general tuning. Plus, i think that 20w40 grade oil is not right, i used to have a 1.3 Passo with a K3 Daihatsu motor, and used to pour in Total 5w30. Although it didn't give me more than 12 KMPL.

[sleeper]

Why doesnt this 20w40 20w50 oil gets banned for good?

Bhai pls dont use such thick oil....thts one of the reason for low fuel avg

[def3nder]

bro you are using wrong grade oil.

[saqibhassan95]

Why doesnt this 20w40 20w50 oil gets banned for good?

If it gets banned, then what mechanics will recommend to their customers? There's no thicker oil out there

[pwuser158773315273]

Thanks for reply. Then kindly suggest the best motor oil for my car in all climate conditions. Also, should it be synthetic or not. One user suggested Total Quartz 5w30.

[pwuser158773315273]

This is shocking...!!! I wish I knew it earlier! Thanks.

[saqibhassan95]

One user suggested Total Quartz 5w30.

Total 5w30 will be best for your ride
Just make sure that it's geniune
@basitali87

[pwuser158773315273]

Thanks for your reply. I guess it is 2SZ FE motor. It is genuine 1.3 with 4 cylinders. Already I have done throttle cleaning, got catalytic converter cleaned, spark plugs cleaning, the front tire pressure 28 and rear 30. Except Sensors cleaning as this facility is not available in my city Kohat. My car has simple rims not alloy, and tyres size is exactly as written on the company metal label inside the car doors. Its mileage is almost 115000 km. I will now use Total 5w30 as you suggested. Hope it is suitable for all climates. Thanks for your precious time.

[pwuser158773315273]

Thanks dear. What about my car's AC issue? You didn't recommend anything.

[anon35615524]

It gives me 8 to 10 km per litre with AC. Without AC, it gives 10. I can't afford it. Is it sensor issue or something else?

Please refer to the post below. It contains some general tips for increasing fuel efficiency, as well as routine maintenance:

These are some of the general tips, for fuel efficiency as well as general car maintenance. Please check, and take remedial actions accordingly: Use OEM recommended Tyre Pressure (TP), and Best time to get TP checked is, when tires are cold and you are just about to start your journey. Do keep a check on wheel balancing and alignment. Use of near to stock and OEM recommended tires specifications. Get your brakes serviced and engine tuned at every 10,000 kms (max.) or as and even required. Get…

Please see and check which apply to your case, and take remedial actions accordingly.

I got its AC gas filled, but in 2 to 3 months, on checking, it was found that its gas had vanished despite there wasn't any leakage in the pipes. Is the AC compressor malfunctioning or is there any other reason?

Only an expert car's AC guy can best guide in this regard.

[anon35615524]

I use 20-40 synthetic motor oil.

I would suggest 10w-30 by Caltex / Havoline, or 10w-40 Fully Synthetic by ZIC, provided, engine health is perfect and you aren't facing any oil consumption issues.

20w-40 I believe is motorcycle grade oil, and quite thick. I may not recommend it for Vitz.

At your car's stage, I would not recommend Total 5w-30 either.

[saqibhassan95]

I got its AC gas filled, but in 2 to 3 months, on checking, it was found that its gas had vanished despite there wasn't any leakage in the pipes. Is the AC compressor malfunctioning or is there any other reason? Kindly guide me. Thanks.

@rajaatta
@Hassan1991

[Hassan1991]

leakage can also be happen in compressor and usually it leaks very slowly.

[shockxwave]

If you can't find any leakage in the engine compartment and the pressure holds up in the system, then check your evaporator. It might be leaking being old and worn out. Also change the expansion valve when you're in there.

[sleeper]

But its driven 115k only...shouldnt we be following oem grade?...5w30 is oem for 1.3L right?

[Thinking]

i have similar ride and it gives around 12-14 KM/Litre with or without AC in the city.

[anon35615524]

Yes. Right. But being 15 years old model, I am a bit sceptical, even if its 115 K Kms driven. And it seems highly unlikely in 15 years. Only its owner can confirm that whether odo reading is 100% accurate or otherwise.

Usually, meters are reversed when cars just arrive at Karachi port. Then, while selling, some owners also reverse meters. So if meter has been reversed once / more, and no one can confirm that meter has not been tempered, I think its better to play safe.

Then, it has also happened here that when owners switched to OEM recommended engine oil grades (although by book, its right and suggestions weren't bad), engine dhuwa'an ma'ar gye! (I can't precisely translate it in English ). That's why I am recommending 10w-30 / 10w-40 being on safer side.

[anon35615524]

10w-30, by Caltex / Havoline is the 2nd choice by most of the mechanics, as well as car owners.

5w-30 Vs 10w-30 may not make much difference regarding Kinematic Viscosity figures and other parameters, on paper, but in actual, there is reasonable difference.

In this particular case, my suggestion is for 10w-30, or 10w-40. 10w-30 being minimum.

[sleeper]

I didnt notice 15yrs old model....and the meter reverse is thing is mostly true.....phr to 10w40 is good to be on safe side