I Don't have the post that started this thread so maybe this is a redundant question. Which octane rating is best to use in our vans. I realize the opinions are probably varied on this so lets all be civil. I promise I won't sue any of you for the damage your recommendation may cause. (remember it's friday) LOL. Leif Paulsen '86 Syncro "4BY-THOR"
> Hi all, glad to see the list is back up. I missed the original anti-ping > posting, so please pardon me if I am repeating someone's reply. > I was taught > that anti-ping additives work by raising the octane rating, thus > making the > fuel more difficult to ignite. The higher the octane, the more heat and > pressure are required to ignite it. Pinging, or pre-detonation, > is when the > fuel/air mixture self-ignites from the heat and pressure, before > the spark is > supplied (dieseling). The higher the compression and greater the > heat, the > greater the danger of pre-detonation. When there is pre-ignition > long before > the piston has risen towards the top of its stroke, the piston > has to fight > its way up against tremendous pressure. This puts tremendous > strain on the > engine, and builds very high heat. Pinging is a quick engine killer. > Antiknock sensors retard the ignition, reducing the heat in the combustion > chamber, thereby making it harder for the fuel to self-ignite on > subsequent > revolutions. Antiknock sensors help, but when you run low octane > fuel in a > high compression engine, even with an antiknock sensor, you are risking > severely shortening the life of your engine. > Zoe Ann & Roger > 1987 Adventurewagen 4x5 > |
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