Super Duper Member
Join Date: Jul 2014
Location: glorious Galt CA
Do not use "super" or other higher-grade gasolines. Waste of money, less energy/unit, no payoff with the Z engine.
With extreme and careful throttle use, you can gain two miles per.... well, we use gallons (US), but overall the amount of effort to get higher mileage, other than just driving no faster than fifty, is more effort than its worth.
Stick with regular gas. And don't buy bottles of crap to dump in there, either.