I've hit 31.5 in the SD before and 34.4 in the SDL too. Granted I was just putting along the interstate around 60-65mph it's pretty good I think. That's with AC off and windows up.
Fuel is from Valero almost always (refined here in Texas) and I use some Power Service stuff. About 5-7oz per tank.
I'm not a quick driver on the freeway usually (I'm the esoteric guy hanging out in the center or left lane rocking out and eating some fruit
), at times I'll hit 70-75 for the hell of it but... I'd rather spend an extra 30min driving and pick up 2-4mpg than to get there just a bit sooner. I'm hardly ever in a rush when driving.
FWIW - only the SD has working Cruise.
SDL
still doesn't work. I've tried three amps and four servos.
Time to trade them all in as cores I think and maybe I can get some decent cash off for both reman.