Could an additive cause engine problems?

I recently received an e-mail from a gentleman who has an O-235 Lycoming and was experiencing a slight miss under some load conditions. He went on to describe all of the work he had done on the engine and yet the engine continued to miss under the same conditions. I gave the owner some suggestions on what to check, then sent the note to my good friend Paul McBride to get his expert opinion.

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Misguided public opinion could end avgas

In my column in the March 23 issue, “”And then there were 10: As oil refineries stop producing avgas, what’s the future hold for us?””, I expressed my opinion of the future of aviation gasoline, noting “”there is concern that once the government starts imposing new regulations, it will go after anything that even sounds bad.””

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Are multi-grade oils bad?

In my last column, “”Multi-grade vs. single-grade oils: The debate continues”” (Feb. 16 issue), I recommend single-grade engine oil over multi-grade oils for use in large radial engines (over 1,800 cubic inches displacement). I am hoping that you all did not read that and conclude that if multi-grades are not as good in large radials, they probably won’t work in a 152 either. This is not the case.

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