Mk4 GTI fuel consumption??

[Sirocco20348]

I would do a decent smoke test to identify boost leaks. Apart from that fuel filter won't do jack all difference, new plugs probably won't either if its not doing anything abnormally.

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[Sirocco20348]

The on takeoff figure is always crazy, my cx5 says I do 80l/hr on takeoff

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[Jmslwthr]

The on takeoff figure is always crazy, my cx5 says I do 80l/hr on takeoff

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Thank you!!! That's what I wanted/needed to know!👌👌👌

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[JustCruisn]

Just did a test from the lights, I actually watched the numbers instead of the road. It hit 99.9 those numbers are crap.

Your 20litres for 180km is 11.1litres/100km
If you are driving in stop start queuing 1st gear, 2nd gear, 1st gear - expect huge numbers.
Having a look at my history on fuelly 13l/100km is the worst, some 12.6 and a 12.3.

As others have stated you do need to drive a whole tank to get a better idea.
Check your tyre pressures.
Fill up the tank until it clicks once, note the odometer reading.
Drive 400km or more fill up the tank again, note the odometer and litres used.

My real numbers for a chipped GTI (I'm not a nice driver).
Highway 7.6
Urban mix stop start + few KM on the expressway 9.2.
Slow ****ty city 12-13

I replaced spark plugs a while back and only noticed more power but no change to fuel consumption on city driving.