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Well, I'm sure having a fouled plug has already tripped the engine light and stored a misfire code or two. Having the knock sensor pick up detonation and retard the timing does not, at least on GM's. And I do have to admit I'm much more familiar with GM's. Still, I don't think you have anything...

Well, if that engine has a particularly high compression ratio, there is the possibility that running a hotter plug could cause the engine to ping. Simply because the plug will retain more heat which could possibly cause the mix to ignite before it's suppose to, which is what detonation(pinging)...

The following link explains Autolite's plug numbering system. Autolite Numbering System In your case an AP-766 would be one heat range hotter. Here's another link explaining spark plug heat ranges. Heat Range Info Oil fouling is most commonly caused by worn rings, so unless you...

If the problem is rings, the conditioners in the high mileage oil won't help you. If it's valve seals, maybe. Have you tried running a hotter plug? A hotter plug will help prevent the oil fouling, or at least prolong the time it takes to foul. Take whatever plug you're currently using to the...

If the problem is rings, the conditioners in the high mileage oil won't help you. If it's valve seals, maybe. Have you tried running a hotter plug? A hotter plug will help prevent the oil fouling, or at least prolong the time it takes to foul. Take whatever plug you're currently using to the...