I installed my AF1 3.5" intake along with Troyer Tunes and Magnaflow Single-Exit exhaust about a year ago.

Is there any maintenance I need to do on the AF1 other than cleaning the air filter? What about cleaning the 02 sensor, etc.? I have noticed my gas mileage has gotten much worse lately, and I can't figure out why.

I'm in Oklahoma, and more and more filling stations are selling 10% ethanol fuel, so that may have something to do with the poorer gas mileage. It is impossible to know if I'm buying 10% ethanol or not because the pumps don't tell you (until July 1 when a new law becomes effective).

Thanks in advance.

 

The only other thing I've cleaned was the 02 sensor with some kind of spray, I forget what it is but it's on the forums here somewhere.

I do that once a year and clean the filter every 6 months. I too have noticed declining fuel economy in a vehicle that already gets great gas mileage.

 

I think all you need to do is clean that filter every 10k miles or so depending how dusty conditions are there where you are in OK..

I don't think you need to mess with the O2 sensors, it's the MAF sensor you need to clean.

They don't tell us here in Tx either how much ethanol is mixed in, unless it's the E85.. I'd bet that it's not the gas, that you need to clean your MAF sensor, and nothing could be easier..

 

around here i fill up at a lot of co-ops and e-10(10%ethanol) is 89 octane while regular is 87...now idk how they rate them and if it's like that all over or not but thats what I go by here