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View Full Version : Gas mileage plummeted

bradyarz
09-24-2011, 05:25 PM
I've been averaging 27-28mpg in my 2008 obs. I filled up the other day, and i've been getting 24mpg since then. I haven't touched anything else. I'll likely have the dealer look at it, (I was going to take it in for a couple other issues anyway while I still have the warranty) but before I take it in, is there anything I can troubleshoot on my own?
JStevens
09-24-2011, 07:47 PM
Clogged Injectors? I dunno how quickly you plan on making it into the dealer, but you might try the Lucas Injector Cleaner on the next fillup.

I may be wrong though. anyone else?
Redrex
09-24-2011, 08:39 PM
How is your tire pressure?

Air filter clean?

When did you last change your spark plugs?
Redrex
09-24-2011, 10:21 PM
Also, by any chance do you think you could have put the wrong grade fuel in? I know some gas stations in my area move the regular button to where most other gas stations have premium.
bradyarz
09-25-2011, 04:06 AM
I did make certain I used regular fuel. I've grabbed the wrong one before, so I do check that. The 30K service was last month, so the spark plugs are brand spanking new. I can look into the tire pressure and air filter today. I don't remember when I last checked those, but it hasn't been all that long.


I think I may have a bottle of injector cleaner somewhere. I'll toss that in this week.
Hitokiri
09-26-2011, 03:18 AM
Could be as simple as a loose inner fender too. I know mine came off after a fox ran into the interstate and my mpg dropped by 7 instantly.
Miner WReX
09-26-2011, 05:57 AM
Winter gas blend? I get 28-29mpg in my WRX in the summer, then it drops to 24-25 in the winter when they switch blends.
bradyarz
09-26-2011, 06:06 AM
Could be as simple as a loose inner fender too. I know mine came off after a fox ran into the interstate and my mpg dropped by 7 instantly.

That's crazy!
DefectiveProduct
09-26-2011, 08:02 AM
Could be as simple as a loose inner fender too. I know mine came off after a fox ran into the interstate and my mpg dropped by 7 instantly.


I second the remark: That's Crazy!
Hitokiri
09-26-2011, 08:15 AM
Haha IDK. It probably had something else wrong, but hell idk. Replaced the inner fender and mpg went back to normal. Puzzling at best.
bluesguyej25
10-18-2011, 02:36 PM
Haha IDK. It probably had something else wrong, but hell idk. Replaced the inner fender and mpg went back to normal. Puzzling at best.

areo...crazy that a little resistance can do that