Is there any real way to check for engine sludge?
#2
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You need to drop the subframe to drop the oil pan which also means getting a alignment because of moving the subframe. I wouldn't sugest it.
#4
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Drain a quart of oil out, add a quart of aggressive engine flush, let the engine idle for 15-20 mins, drain everything out and change oil/filter. If you use synthetic oil, it's almost certain that you have zero sludge.
Cheers,
Cheers,
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