91, and 93 written on the fuel dispenser, which while seemingly adds to the confusion, actually keeps things consistent.

Although the octane rating might be identical, premium petrol often include additives to boost engine protection and optimize ...

but for optimal performance and efficiency you’re going to want to run premium. The only Acura that absolutely requires ...

Whereas 93 octane is the common premium fuel in the Northeast U.S., West coast drivers operate the very same vehicles on 91 (often the highest octane available), with no particular ill effects.

Opal fuel is safe to use if the manufacturer recommends the use of regular unleaded 91 octane fuel as a minimum. Opal fuel is suitable for use in cars and boats that are compatible with regular ...

Using premium fuel in your Toyota is a secret method to unlock more power, but the opposite rings true for Lexus vehicles. If ...

Opal fuel is suitable for all vehicles that require regular unleaded 91 as a minimum. Only vehicles that require a premium unleaded fuel with an octane rating of 95 or higher should not use Opal.