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Does the engine oil flush remove all previous oil and sludge? Can diesel or petrol be used to flush…

Does the engine oil flush remove all previous oil and sludge? Can diesel or petrol be used to flush or simply drain through the engine?

It removes a lot of it. Most flushes are pretty much mainly diesel fuel anyway. you follow the directions on the can, run it a short time, then drain and change oil and filter

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