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Lead fuel vs. unleaded fuel
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Posted by Tom on February 25, 2004 at 10:49:27 from (64.90.66.253):
I recently read an article in the aviation safety magazine that discussed the use of automobile gas in an airplane engine due to the high price av gas. This article states that leaded fuels are only necessary during the break in period of the valves, after which time, unleaded fuel works fine. I was always told that unleaded would destroy my valves. Here is the pargraph: "This worked well until the engine manufacturers started getting complaints about breaking in new valves – such as following a cylinder swap or after a major/top overhaul – on the unleaded gas that was still available at the time. Since the new valves now apparently needed some lead to prevent overheating and welding of the valves in the guides and seats, in November 1946 Continental issued a service bulletin recommending that engines with new valves should be run two to three hours on leaded gas prior to operating on unleaded. If break-in were performed in this manner, the valves should operate satisfactorily on unleaded for the remainder of its life." (Aviation Safety Magazine. "Burn, Baby, Burn." May 2003) Here is a link to the entire article: http://www.aviationsafetymagazine.com/archives/23_5/features/7188-1.html What do you guys think? -Tom
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