Granted- another good reason to just change more often. These gruves had to come from no oil - for at least a short time - not just to much soot. My oil test is two fingers and a paper towel. To that issue - can you get a magnetic drain plug. It's been awhile - how do you magnetise something?

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89 300E
79 240D
72 Westy
63 Bug sunroof
85 Jeep CJ7
86 Chevy 6.2l diesel PU

"The object of life is not to be on the side of the majority, but to escape finding oneself in the ranks of the insane."
Marcus Aurelius