i call bs on dry asphalt.

 

I allways check anyways and last time most of them were way off.

 

well something isnt mixing.. could be air/fuel ratio off???

 

guys have seen gains in mpg with bigger wheels and tires because of the rolling mass... maybe because you went to a smaller tire that it hurting you, also how are your driving habits??? like granny driving or maniac??? have you done all the routine maintenance? could trying a synthetic oil, also what gears do you have? are you keeping the right air pressure in your tires? are you buying cheapo gas or like a decent kind (walmart vs Sunoco?)


I can drive 80+ for long periods of time and still get 21mpg on the highway.

and with spinning of the tires sounds like you are pretty rough on the running gear... if you are trying to get the tires sticker stock tires are not the ones to be doing a burnout in... go get some drag radials and spin those

 

I dont... =]

I call a challenge maybe..

cause i gain full traction at about 50 mph spinning then they grip. its all in how drop the clutch and road composite. as well as direction of the truck.

 

Ok. I dont gun it off the line much. Only when I need to pass someone. 4.10's. Went to 255's from 235's. so went a little bigger. Is there a possiblity when I did the seafoam it gummed up my o2 sensors. Because after the seafoam treatment the check engine light came on for about 2 weeks. I dont know how much the o2 sensors could affect my mpg's. What about my wires. Pretty sure they are stock. But even then I dont see getting new ones making much of a difference. Thanks for all the responses.