Page 1 of 1
losing gas mileage
Posted: Fri Jul 09, 2004 8:53 am
by Flip_x
well my car is being really weird latley its been lossing gas milage. first off it was around 30+ but now its creaped its way down to 20 or lower. i dont get it. what can be the cause of this problem?? Would u think its because of the high octane gas? i use 91 for an n/a. it runs smooth but the exhaust sounds diffrent with it too. so maybe if i go back to 89? oh well thx for your help
Posted: Fri Jul 09, 2004 9:31 am
by kastrix
Do you have your A/C or defrosters on?
Sorry...
I had mine drop about 5 this summer when gas jumped up. Its stayed that way tho so i dunno what happened, no change in brand or octane. Maybe your gas is getting watered down
Posted: Fri Jul 09, 2004 2:23 pm
by vrg3
How long did it take to creep down there?
Maybe your car's just asking you for an ignition tuneup
.
If not, then maybe something else needs replacement. A clogged air filter certainly affects mileage. A tired-out oxygen sensor can, too.
It's probably a combination of things, because 30 down to 20 is a very big change. But I'd start with those things. And a nice Sea Foam treatment couldn't hurt.
91 seems high for an NA. 89 or 87 would probably be better... I seem to recall a consensus between a few NA owners that 89 seemed best for their cars.
Posted: Fri Jul 09, 2004 7:57 pm
by Flip_x
no the ac is off. and its happend within a month every week or other week i fill up my tank
Posted: Fri Jul 09, 2004 7:58 pm
by Flip_x
oh yeah. spark plugs, and airfilter is about 3k old so i wouldnt think so about that