fuel type 87 or 91

[Wild One]

I have to disagree that "gas is gas". Some cars are finicky about gas. Corvettes from 1997-2004 don't have a simple float that measures the level of gas in the gas tank. Their fuel level sender units are notoriously sensitive to sulphur in gas. Too much sulphur (cheap gas) and that sensor is kaput. There's anecdotal evidence that Chevron with Techron can fix that particular problem, and keep it from coming back.

I wonder what the H3 uses to detect fuel level. The simpler the better sometimes...