"that use of the necesary higher octane in a higher compression engine is, of course, an advantage buttttttttt use of higher octane then necessary in a lower compression engine can even be detrimental"
Agreed.
The only way to take advantage of the power POTENTIAL of high octane is to have a high compression engine (8.8:1 compression ratio or higher) in a vacuum advance inginition system. However, even that is debateable in modern vehicles.
My 3.0 Duratech engine has a 10:1 compression ratio with electronic controlled ignition. I have noticed no differance in mileage or power when using the 91 octane instead of Ford's recomended 87 octane.
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Today's Featured Article - The Cletrac General GG and the BF Avery A - A Bit of History - by Mike Ballash. This article is a summary of what I have gathered up from various sources on the Gletrac General GG and the B. F. Avery model A tractors. I am quite sure that most of it is accurate. The General GG was made by the Cleveland Tractor Company (Cletrac) of Cleveland, Ohio. Originally the company was called the Cleveland Motor Plow Company which began in 1912, then the Cleveland Tractor Company (1917) and finally Cletrac.
... [Read Article]
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