Join Date: Jul 2018
Location: Parts Unknown NY
I have always run Super/Pemium in my vehicles, and it what I currently run in my '12 GS - especially since it's been tuned (GM/Buick Stage 1 kit...).
As for mileage, I dont know the specific numbers. But I CAN tell you the I can go from Albany, NY to Providence, RI and back on a full tank...
Josh in NY
'12 Regal GS Stage 1, 6MT, Areoforce Interceptor w/ custom pod