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1.8T Gas Mileage..??? Is this normal???

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Old 12-31-2008, 09:41 AM
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Default 2nd on a new O2 sensor. My '04 1.8 6M is getting 26 -27 average driving

and 32 on highway in recent weeks. Chang O2 and 2nd on checking the MAF also.
Pull codes.
Old 12-31-2008, 10:06 AM
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with normal non winter blend i get 24/30, but my engine is also kept in top shape
Old 12-31-2008, 11:31 AM
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Default My girlfrind's 1.8T was reading 18.5 or so and I reset the MPG

counter by holding the button under the lever until it resets. Then now it reads 26 to 29 MPG. Maybe the counter can use a reboot. Just a sugestion...
Old 12-31-2008, 11:52 AM
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Summer I get 26 actual. In winter I'm getting 23-24. Mostly sane driving
Old 12-31-2008, 02:17 PM
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2nd! +Seafoam it.
Old 12-31-2008, 04:47 PM
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Default i always see ppl here claiming pretty high numbers, but my mileage is usually around that (18-20)..

if i drive like a granny i can get 22-23. i am chipped with bigger injectors, which takes a hit, but even before that mileage was only 1-2mpg better.

it's been consistent from i got the car at 60k to now at 125k. (fyi, i seafoamed at 110k)
Old 12-31-2008, 05:37 PM
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Is your belly pan on? I lost a few MPG's when I had it off for a while.
Old 12-31-2008, 07:03 PM
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Default I get 30 mpg on hwy at 75 and I have 153K on car. No cat, free flow

exhaust manifold, free flow exhaust, big turbo, etc.
Much better then stk. as long as I keep my foot out of it...
Old 12-31-2008, 08:34 PM
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Default Are you going off of the cars computer for the MPG? The......

dash read-out is only (somewhat) accurate on a stock car. Once you start modding you need to VAG the controller to compensate for the larger fuel injectors. When I was running stage 1+ I would show 32MPG on a 50/50 commute, when in reality I was getting 26MPG.
Old 01-01-2009, 04:06 AM
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Default Seems a little low. Do a Seafoam or BG44k treatment and try a different brand of gas.

I seem to get the bast milage with Shell up here in NH. Winter usually 22-24mpg, summer 24-26mpg. with most driving on secondary roads, 3-4th gear.

If you are still on the factory plugs it might be time to check those, air filter and also check the O2 sensors.


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