it helps. its spreads the seafoam throughout the whole engine. you should jus do it 50 miles before your next oil change. and make sure the k&n filter you get is non-oiled

 

do you oil it yourself or put it in your car non oiled?

 

get a non-oiled one and never oil it. the oil will ruin your MAF

 

ok sounds good but does anyone know the price for an inspection at the dealership?

 

Thanks for all the help I'll see what the mechanic says

 

First of all, the "high mileage" on the first half a tank, and poor mileage on the last half a tank is your fuel guage sender unit. Most cars are non linear and this is common. Calculate your mileage over an entire tank, or use the mileage calculator on the console.

Bad mileage is caused by a number of things.

Mileage goes down in winter.
Mileage goes down if you use gas that is 10% ethanol
Mileage goes down if you haven't given your car a tune up (dirty air filter, spark plugs).

Mileage goes down if your injectors are dirty Try some techron or Redline injector cleaner.

Check for codes. Check the precat oxygen senor.

 

its 80 bucks for everything. If you know anyone who has a vag-com, you can probably ask them to scan for codes. Its much easier to diagnose it that way. But if you dont, then do all the stuff chaos said. I have bad milage in my car, but it did improve alot after i got new fuel filter. However in my case, i know that i probably have a bad maf or o2. Just to lazy to get it fixed right now

 

aiight thanks alot guys appreciate it