100LL vs 87 Octane in Lycoming O-290D

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ronpenrose
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Joined: Sun Apr 18, 2010 9:43 pm
Location: Prairie Village, KS

100LL vs 87 Octane in Lycoming O-290D

Post by ronpenrose »

I have a converted O-290G on by CB-1. Typically use 87 autogas but now at an airport with only 100LL. I have heard you can run 100LL for a period of time then cycle back to autogas. I also so a Lycoming document once that addresses this but have not been able to find it when I need it now. Would appreciate opinions on this and reference to a specific document if known.
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mtaylor
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Joined: Tue Mar 23, 2010 5:11 pm

Re: 100LL vs 87 Octane in Lycoming O-290D

Post by mtaylor »

Mix 5 gal 100 octane with 20 gal premium unleaded. Perfect for low compression engines.
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ronpenrose
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Joined: Sun Apr 18, 2010 9:43 pm
Location: Prairie Village, KS

Re: 100LL vs 87 Octane in Lycoming O-290D

Post by ronpenrose »

I thought perhaps some mox of the two would work. Appreciate the response.
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