Just my $0.02 worth. I work as a tech in a new car dealership. I can't recall any of our vehicles running only 8.5 compression. Most of them are in the 9.5 to 11.5:1 range and recommend 87 octane. These modern engines also put out up to 400+ HP. Even the 4 cyl can get close to 300 HP with the factory turbo. Of course they also use variable valve timing and ignition timing to control detonation. I also remember detonation issues on cars of the mid 70s through the mid to late 80s because they were trying to raise temps and lean out mixtures to reduce emissions. Those things would "ping" with 8:1 compression on 87 octane and put out 110 HP with a 350 V-8. Anyway I'll keep running 87 in my M's since I don't use them that hard anyway and haven't had any problem yet.
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Today's Featured Article - Upgrading an Oliver Super 55 Electrical System - by Dennis Hawkins. My old Oliver Super 55 has been just sitting and rusting for several years now. I really hate to see a good tractor being treated that way, but not being able to start it without a 30 minute point filing ritual every time contributed to its demise. If it would just start when I turn the key, then I would use it more often. In addition to a bad case of old age, most of the tractor's original electrical system was simply too unreliable to keep. The main focus of this page is to show how I upgr
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