Posted by MarkB_MI on June 14, 2021 at 02:20:08 from (174.230.18.126):
In Reply to: Re: Aircraft fuel posted by buickanddeere on June 13, 2021 at 16:14:10:
According to Wikipedia, 100LL has a maximum lead content of .56 grams per liter, while it's 1.12 for 100/130 and 1.29 for 115/145. (The article quotes sources for the 100LL and 115/145 specs, but not for 100/130). If these numbers are right, 100LL still contains about half as much lead as those other high-octane fuel, which is to say a bunch.
By comparison, the old 80/87 octane fuel only contained about .14 grams per liter. Which explains why owners of older aircraft had so much trouble with fouled spark plugs when 100LL was introduced as a replacement for 80/87.
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