CharlieWaffles
Well Known Member
In my new Lycoming YIO-540 there was a Service Instruction (No 1472) called "Removal of Preservative Oil From Engine". It was throwing me as it talks about removing the preservative oil PRIOR to installation and I thought the oil stayed until the first 25 hours were up.
Now when I go look at the Service Instructions page, this one is not listed (http://www.lycoming.textron.com/support/publications/service-instructions/index.html). Does that mean it is no longer applicable?
It also conflicts with Service Instruction 1014M "Lubricating Oil Recommendations" which is 1 year newer. It says "...This preservative oil must be removed at (sic) end of the first 25 hours of operation". (http://www.lycoming.textron.com/support/publications/service-instructions/pdfs/SI1014M.pdf)
What is the deal with the preservative oil and the initial 25 hours? Drain and replace with the recommended Mineral Oil, or use the first 25 and then change to mineral?
Now when I go look at the Service Instructions page, this one is not listed (http://www.lycoming.textron.com/support/publications/service-instructions/index.html). Does that mean it is no longer applicable?
It also conflicts with Service Instruction 1014M "Lubricating Oil Recommendations" which is 1 year newer. It says "...This preservative oil must be removed at (sic) end of the first 25 hours of operation". (http://www.lycoming.textron.com/support/publications/service-instructions/pdfs/SI1014M.pdf)
What is the deal with the preservative oil and the initial 25 hours? Drain and replace with the recommended Mineral Oil, or use the first 25 and then change to mineral?
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