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With all these comments about thick cold oil, I' wonder why no one is using
100% synthetic, which was given top marks in an extensive test by Aviation
Consumers many years ago... the leading ones being BelRay and ... and also
Mobile 1.
Hello Terrence,
If you use 100% synthetic, just be sure not to use leaded aviation fuel. The 100% synthetics leave what is called, I believe, "grey paint". Seems that they don't scavenge the lead. Mobile Av1 was taken off the market several years ago because of a large number of problems and law suits over this.
Todays solution seems to be the semi-synthetics such as the multigrade AeroShell and more recently Exxon Elite. I have used the Exxon Elite in my engine for almost 1,000 hrs (except for break-in). It has performed well and allowed easy cold starts. Has all of the advantages that you site above and is designed for leaded avgas.
Bill Harrelson
5zq@cox.net
N5ZQ 320 950+ hrs
N6ZQ IV 1%
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