Diablosport Forums

OK Diablo, at the risk of posting a dumb question. I just want to make sure I understood the posts correctly. The new MPG tune is based on 87 octane gas correct? I am currently running the performance tune for better mpg, using the 93 octane and since I am retiring next summer, I would love to save a buck or two and the pump.

2009 Chevy 2500HD 6.0L V8

Airaids Cold Air Intake
Airaids Throttle Body Spacer
Gibson Swept Side exhaust

Yes, it is designed for a minimum of 91 octane.

The MPG booster is designed for a minimum of 91 octane?? or the performance tune?

i went from the 87 octane tune to mpg booster and fuel economy along with performance are worse. and dont even bother trying to tow anything. i went from 10mpg to 6mpg towing the same rv to the same destination as i always did. back to 9r19 with 87 octane tune for me.

OK, thank you. I think I may have to play with it a bit and see if the 87 tune or the performance (93) tune have a bid difference in mileage. I won't be pulling much anymore so I can probably go down. Did you use 87 with the mpg booster?

yes i used 87 oct. the mpg booster tune is designed for use with 87 octane

Thanks for the help rjaro7