E46 Fanatics Forum banner
1 - 13 of 13 Posts

·
:D
Joined
·
7,274 Posts
Air filter. Spark plugs (if they're old) fuel filter. Clean injectors. Use seafoam. Drive smoother/easier. Have tires properly inflated.
You should get 18-22 city and around 30 highway.
If you're way off post your numbers.
 

·
Registered
Joined
·
1,131 Posts
sparkeys first and easy, i just received mine and gona change em this weekend. im gettign the worst fuel mileage right now will see how it imroves after i change em. i barely get 400 km (250 miles) on full tank
 

·
Registered
Joined
·
286 Posts
15" wheels (195/65) nitrogen filled, always use cruisecontrol, AmsOil P.i. Improver, Premium fuel and a light right foot gives me 30.8 MPG (13.1 km/L). It gives me well over 400 miles (650 km) on a tank and I fill up with about a quarter tank left. So i guess 500 miles (800+ km) on a tank should be doable..... :hmm: sounds like a lot :hmm: My daily commute is 80% highway but also daily traffic jams. The MPG drops to 30.3 MPG (12.9 km/L) with traffic jams and 20% city driving.
 

·
Registered
Joined
·
677 Posts
If you can describe your current gas mileage, and why you want to improve it we might be of more help to you.

In general you lose a bit over time because of the Air Filter, Fuel Filter, Fuel Injectors, and belts wearing.
So if it used to be higher and now is dipping, change plugs, run some injector cleaner, replace filter and belts also.

Learning how to drive fuel efficient is certainly a skill.
In general higher gears are more fuel efficient if you accelerate gradually.
Also stay off the brakes if you can, coasting is your friend for fuel economy.
 

·
Registered
Joined
·
2,318 Posts
Save your money on the air filter, a new one will improve performance but not mileage.

Run a large bottle of Chevron Techron (20 gallon) through your next tank of premium gas.

Good source for MPG improvement tips:

http://fueleconomy.gov/feg/maintain.shtml#tune-engine

NEW INFORMATION: Replacing a Clogged Air Filter on Modern Cars Improves Performance but Not MPG
A new study shows that replacing a clogged air filter on cars with fuel-injected, computer-controlled gasoline engines does not improve fuel economy but it can improve acceleration time by around 6 to 11 percent.

http://fueleconomy.gov/feg/pdfs/Air_Filter_Effects_02_26_2009.pdf

More good reading from Canada !! :)
http://oee.nrcan.gc.ca/transportation/personal/15864
 
1 - 13 of 13 Posts
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.
Top