I struggled through this winter gas bologna, but now I am still getting the same mileage as I was with winter gas. And last summer the lowest my mileage ever reached was 17mpg for a full tank. My dealer says I should run some engine cleaner or injector cleaner or whatever through it, but I don't buy it. What do you guys think?

Fill date brand (gal) odometer Calc efficiency

4/29/2009 BP 13.523 22252 15.20
5/4/2009 BP 6.634 22357 15.83
5/13/2009 P66 13.257 22577 16.60
5/20/2009 Sams 10.455 22738 15.40
5/26/2009 P66 9.117 22884 16.01
6/6/2009 Sams 12.651 23077 15.26

at the 5/26 fillup I had new tires. Before (with the baldies) I was getting an overreport of about 4% on my mileage, so I expect it to be slightly more accurate now.

I am at a loss.

 

Be happy.. I'm at 13mpg still lol

 

That my average as well, did you start doing more city driving versus highway? What's your tire pressure set at? Injector cleaner may help but for city driving your not ridiculously low.

 

try changing the spark plug, clean the air filter.

 

Brand new coils at the dealer about when I started tracking this btw. I will take it in and change the plugs. Air filter shouldn't be dirty, was a brand new K&N late last fall. I really don't want to try and yank that damn airbox out again. That thing is the biggest PITA ever.

I have read about trying the MAF cleaning routine. I am going to give that a shot probably.