Thread: Gas mpg

The cooler weather, depending on how the PCM is set up, can affect fuel economy 15 to maybe 25%. Seems like I lost about 3 maybe 4 mpg in the winter.

So far, with the cooler weather and more ethonal in the gas, I have lost 1-1.5 mpg. And it isn't even that cold out yet. My average mpg over all my driving will drop from about 28mpg to around 25mpg. Just the way it is....

^ man, if only ethanol was cheaper, it's a waste of money right now

I average low 17s in all city driving. That is with rpms of 2,000 or lower. I have bumped up timing just alittle in crusing cells to about +6 from the stock timing 98 table. (The changes have been applied to the GFS and MBS table equally)

Fuel economy didn't really change from stock timing I might add. I was thinking of adding timing to low 40s in cruise cells but haven't had the time to do that 2* at a time to get there. I was also thinking about replacing the 104s with 605s for the winter months.