the threads on the plug should be enough to hold the oil in, although i suppose it wouldn't hurt to try a new gasket. If the threads in the pan are worn i suppose it could cause a leak, so that gasket might prevent it.
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2003 Alero GL2 LA1: pacesetter cat back, Energy Speed WAI, Magnaflow downpipe/cat, tinted tail lights, and polished letters on intake manifold.
1987 Honda Rebel 450
1967 Buick Riviera 430 Wildcat: roadworthy but needs restoration.
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