Recommended for engines with a turbo chargers, prevents pre-detonation due to higher pressures in the cylinder around TDC during compression stroke. But you don't need 91. Then again, this is the "Home of the Free", and i have no idea what Hyundai he has.
Exactly. Read the owner's manual for your vehicle. Some engines have variable valve timing in addition to octane or knock sensors and will retard the ignition and modify the valve timing if lower octane fuel is used.
But if you DON'T have one of those engines then it's just psychosomatic. "I spent more so I get more!" type of shit.
Recommended for engines with a turbo chargers, prevents pre-detonation due to higher pressures in the cylinder around TDC during compression stroke. But you don't need 91. Then again, this is the "Home of the Free", and i have no idea what Hyundai he has.
✓ over 9000x this! Stop wasting money on your shitbox.
I once had a Ford Escape with a Turbo Engine, owners manual said it can run on standard but gets better mileage with premium
Exactly. Read the owner's manual for your vehicle. Some engines have variable valve timing in addition to octane or knock sensors and will retard the ignition and modify the valve timing if lower octane fuel is used.
But if you DON'T have one of those engines then it's just psychosomatic. "I spent more so I get more!" type of shit.
Because of the Turbo Engine. It would require a higher octane level to perform the way it was designed too.
Even turbos are tuned to take 87 now a days. My VW 1.8t used to require 93, now the modern VW 1.8t takes 87.