Re: What fuel do you use?
I use whatever the manufacturer considers recommended. For the Hemi that's 89. While the computers can adjust for 87, they are adjusting from optimum setting.
If I had the V6 I would use 87.
With today's gas mixtures, what GCLimited said is important, go to a high volume station. Gas that sits for long periods loses something.
I was curious when Chevy was running all the Volt commercials with the idiot who said she gassed up so little she couldn't remember where the filler was located. According to Chevy, the Volt stirs/mixes the gas periodically, and if you go too long without getting gas it will run on gas until you get to where you need to add some.
If you need a shoulder to cry on ...
... pull over to the side of the road!