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fatdog77 -> RE: WOW...what a MPG improvement!!!! (2/15/2007 10:34:01 AM)
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I am having the same problem.
Brand new in June 2006 I was getting about 15 mpg. About two months later, I put on a Gibson exhaust and Airaid CAI and that bumped me up to 16.5-17. Now that is all with about a 50/50 split of city and highway driving. In early November, the exhaust manifold blew and baffle material fell into the catalytic convertor. Back to the dealer for repairs and suddenly I'm lucky if I get 13. The last fill up showed I was getting 10. All with the same kind of driving. The dealer plugged it in and said the computer checked out fine and that's all they can do. I call BS.
So far they have explained it to me as being caused by the blended ethanol gasoline sold in the area (even though my county has no ethanol just theirs), agressive driving (even though I drive the same to get 10 as I did to get 17), cold weather (despite a week in the 50's when I pulled off a whopping 12), etc... Unfortunately for me there is only one Hummer dealer in the state so I'm kind of stuck. Supposedly they are talking with some special techs at GM to figure out what it could be, but this is getting old fast.
I could take 17 even though they advertise 20. But 10? That''s just f'ing crazy. To be honest, I've already been turned off from getting another Hummer anything. Hell, if it wasn't for the fact that I'm leasing this one it would be gone already.
Does anybody have anything concrete I can take to the dealer and say "Check this"?
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