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had some of the camber taken out of the rear the other week, and have used only one tank since, so not sure if i've just been driving gentler than normal or if its cause of the wheel alignment but i just got 400 out of a full tank, previous best was bout 330 for same city driving (average 290), highway when i drove it back from brissy i was getting approx 400-450 per tank, fingers crossed my fuel bill will be a bit cheaper now

  • 11 months later...

I was getting 300-350 regardless of driving style.

Changed the o2, coolent temp, afm. I'm now getting 400+ with 50L of fuel.

Should just get a nistune sisbro, it will give you better economy than what you will ever get from brand new sensors.

I've been told you can expect 50-150k extra from a tank with a nistune. So you would make back your money within a year easy

only managed to fill the stagea up once, and it got 396 when i got to e mark, not sure if that's good or not, car is still totally stock, gonna look at removing the middle muffler if i can't get a cat back exhaust soon enough

let you know how it goes once the new clutch goes in, and then when I sort the exhaust

  • 2 weeks later...

Series 1 RSFour, big front mount, rear muffler removed (replaced with small 2.5" dia canon, so nearly standard ex) rest of engine stock, standard 5-7psi boost and manual conversion, always does 400/tank regardless of city or hwy.

Although once got 450/tank on E100 but can't get it where I live.

Not real good on fuel but its a great car, so I don't really care!

My old hsv 185kw vs 5L was good at 8.5l/100km but was no where near as fast as the stagea, or as practical!

Old thread. New s2 rs. Lucky to get 150k out of 3/4 tank!

Cleaner afm last night, reset ecu, will change o2 sensor, wish me luck!

This is why X km per tank is a useless measurement.

Even if we consider "a tank" to be 60 litres on the conservative side, you're still using 45L per 150km.

That's 30L/100km, and totally absurd for normal road driving. Except if you owned an old turbo bentley, or a veyron....

You need to do a proper measurement first.

Driving 95 percent of time off boost I managed to get 16ltr per 100 much better than over 20ltr before

Hopefully the 02 sensor helps. I noticed the exhuast fumes smell really rich on cold start, not sure if the 02 will help or there's another adjustment somewhere?

Driving 95 percent of time off boost I managed to get 16ltr per 100 much better than over 20ltr before

Hopefully the 02 sensor helps. I noticed the exhuast fumes smell really rich on cold start, not sure if the 02 will help or there's another adjustment somewhere?

16L/100km is still above average, but only by about 3L/100km

Has a previous owner done mods to it? Different injectors? If theyre stock, perhaps try taking them out and getting cleaned professionally, they may be working poorly.

When's the last time an alignment was done?

What length of trips are you normally driving?

With the wheels off the ground, how easily do the wheels turn? Are any brakes binding?

Anything over 20L/100km for normal driving is a worry though. The fuels gotta be going somewhere. Is the back of your bumper sooty around the exhaust?

Only had the car for about 6 weeks, the car is stock I believe

Most of my driving is very short trips but again the needle doesn't move in front of my eyes like before I cleaned the afm and tightened all the loose cooler pipes

No black marks around my bumper

But the cold start stinks my garage out bad

RS4s with 71k kms, stock aside from Nismo cat back and k&n panel. 400km's out of a full tank (55odd liters), 80% urban driving, 20% freeway. Can squeeze 450km's if I drive like there is a cop behind me everywhere I go... Otherwise not a heavy, not a light foot.

Cold start REAKS and I have black soot around my bumper so I'm guessing it's running the standard jap rich :P. So pretty happy overall.

Few mods and a nistune and I recon it'd get better

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