General topics » Gasoline octane comparison chart

You might find this chart comparing European RON and U.S. pump gasoline octane interesting: http://www.pencilgeek.org/2009/05/octane...onversions.html

In Europe these days you will only find RON 95 Super, 98 Super Plus and sometimes 100/102 (vPower/Ultimate). The Euro 95 both as E5 and E10 (% ethanol), 98 is E5 and 100 sometimes is E0 but mostly E5. All thanks to regulation and standardization.

You have got to give the oil companies and government regulators credit for keeping us guessing regarding what we are putting in our fuel tanks. I feel like I am trying to find the pebble under the three nut shells as they constantly get moved around.

Thanks. A common source of confusion, for sure. My Da was a Mechanical Engineer in the petro-chemical business, so I knew about the difference. However, I wouldn't call it "common knowledge..." Most folks don't know what the R or the M even represent!