• The site migration is complete! Hopefully everything transferred properly from the multiple decades old software we were using before. If you notice any issues please let me know, thanks! Also, I'm still working on things like chatbox, etc so hopefully those will be working in the next week or two.

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....
 
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.
 
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