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Re:Oils - 2007/01/23 17:39

Probably the most important thing with oil is to change it regularly. Oil will hold in suspension the contaminants that the engine produces and water moisture that can cause the engine to corrode and the camshafts to fail. Changing the oil at the manufacturer's recommended periods is most important to make your engine last longer, 25 hourly if you run a pressure screen system or 50 hourly if you have a full flow system (e.g. can filter).

As for the type of oils, it really depends on where, what and how you operate your aircraft.
Aeroshell have some interesting frequently asked questions on their web site on http://www.shell.com/home/Framework?siteId=aviation-en&FC2=/aviation-en/html/iwgen/leftnavs/zzz_lhn3_4_0.html&FC3=/aviation-en/html/iwgen/aeroshell_site/frequently_asked_questions.html#11

AirBP (Castrol) have information available on http://www.castrol.com/castrol/faq.do?categoryId=9001946&contentId=7005219

And Mobile on http://www.exxonelite.com/Lubes/Exxon/elite/FAQ.html

I have asked the oil companies to provide some more data on choosing oils and will post it here as soon as it comes in.