Diablo tune

[Chevybass]

I have a kn cold air intake,flowmaster supper 44 with stock pipes. Put a hard bed cover on to keep snow out of my bed and figured it would make it more aerodynamic. Ran the 87 performance tune for about 2 months and I like it. Only complaint is that I average 12.5 mpgs but that's probably might fault. I put the 87 economy tune on today and disabled the afm. Hope the see my mpgs go up. Biggest difference I notice is the trans will shift into the last gear quick . But I have no problems getting up to speed anyway. Normal mpgs? Or am I just driving like a ass? Lol

 

[bgbdwlf2500]

If youre mostly in the city driving aggressively then its probably about right. If youre on the highway a lot then id say its low. I'm at about 12.5 on mine right now but I'm running e85 which already kills mpgs and then its been colder than normal here in SC so I also let it warm up, probably more than I should. I'm using a superchips to disable afm and adjust for tire size and running the stock tune. When I had the 91 octane tune installed and kept it at 65 on a nice road to cruise on I was getting 22.5, start getting over 75 and mpg drops quickly