Gas milage drastically dropped

[CNDExplorer]

Hey guys, my gas milage has drastically dropped from about 420km before the warning light to 360km. Usually I get about 120km on the first quarter tank and now I am getting around 85-95km. The only thing I have done recently to it was and oil change. Any ideas. I am going to replace my Airaid filter because it the fins are a little bent but it has been like that for a long time so I can't see that to be the cause of the drastic change in milage. Any ideas? Fuel filter possibly?

 

[nickm347]

How many miles are on the car? I dont know much about Airraid filters, but I'll assume they are like K&N filters. If its dirty you may want to clean it and re-oil it.

 

[CNDExplorer]

There are 121 500km on it. Fairly low milage.

 

[CNDExplorer]

bump

 

[celly]

They're probably using "winter gas" at the pumps up here in Calgary now. The additives in it reduce mileage significantly. 60 km to a tank would be about right. I had the same problem with my '00 Sport and I see it in my '99 Eddie Bauer now. Come to think about it, my mileage is probably tailing off a bit right now as well.

If you're looking at new air filters (I assume you're using a conical filter and aftermarket intake setup). I've got several filters to choose from that I'd sell for a good price. Two versions of K&N, one made by Green (highest quality oiled filters out there), the AFE that came with my Volant (every bit as good as K&N if not better) and a cheapo no-name one that came with another intake setup. All are assorted sizes, but all come with a 3.5" internal diameter on the flange. All have low miles on them (except the AFE and it's been recently cleaned and re-oiled). The no name one has no miles and I'd give that one away. Moving soon so one less filter to move would be nice.

PM me if interested.

 

[CNDExplorer]

I added some Lucas Oil fuel treatment and it brought my milage up a considerably, but it still is lowwer than normal. I haven't had a chance to clean out my air filter yet and I am going to replace my fuel filter too I think.

How often should fuel filter be changed?

 

[Afboy143]

maybe you should run some simple maintenance if you havent already, if these components havent been changed in a while they harm fuel milage

spark plugs
wires
fuel filter
02 Sensors
PCV Valve

Maybe even run 91/93 octane fuel for one tank with injector cleaner.