Some people prefer it because it runs smoother. It’s only like $3 more when filling up. California has weird fuel formulations so it probably has something to do with it.
It doesn't run smoother. I am not sure where the hell people came up with this myth, but it is not the truth. Higher grade gas is for high combustion engines.
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.
Was about to ask same thing
Some people prefer it because it runs smoother. It’s only like $3 more when filling up. California has weird fuel formulations so it probably has something to do with it.
It doesn't run smoother. I am not sure where the hell people came up with this myth, but it is not the truth. Higher grade gas is for high combustion engines.
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.