87 is the lowest octane here. 88 and 91 I think is premium. Always read up on your vehicles manual. Suggested to use 87 or 88 but not 91 on my jeep and the Milan. Some want that high octane some run best lower.
I'm just glad I dong still have the diesel Mercedes but it was a nice ride.
I noticed in another post that your petrol (gasoline) is only 87 Ron, is that normal in the US?
I only ask because 95 Ron is our minimum octane at fuel stations (UK).
87 is the lowest octane here. 88 and 91 I think is premium. Always read up on your vehicles manual. Suggested to use 87 or 88 but not 91 on my jeep and the Milan. Some want that high octane some run best lower. I'm just glad I dong still have the diesel Mercedes but it was a nice ride.
Some of the mountain states in the west are as low as 85 octane and they have many places that sell e15 crap to boot.