Can a Car That Uses 95 Octane Gasoline Also Use 92 Octane?

[WalkerFitz]

A car that uses 95 octane gasoline can occasionally use 92 octane, but it should not be done frequently. Here is some information about gasoline octane ratings: Gasoline octane ratings represent the octane value of the gasoline. 1. For 92 octane gasoline, the isooctane proportion is about 92%, and the heptane proportion is about 8%. 2. For 95 octane gasoline, the isooctane proportion is about 95%, and the heptane proportion is about 5%. Additional information: Rules for selecting gasoline octane ratings: 1. For a compression ratio of 7.5-8.0, use 90-93 octane gasoline. 2. For a compression ratio of 8.0-8.5, use 90-93 octane gasoline. 3. For a compression ratio of 8.5-9.0, use 93-95 octane gasoline. 4. For a compression ratio of 9.5-10.0, use 95-97 octane gasoline.