PROOF Rear main Seal damage from Mobil1 High mileage oil?
Seal swelling additives inside the high mileage oil are said to cause oil leaks on New engines through the crankshaft seal, rear main seal oil leak, valve cover gasket oil leaks and more.
Can High Mileage oil Damage an Engine?
So we test regular oil vs high mileage oil to see if we can show a difference. The next test on Nates interactive auto will be using oil stop leak thats supposed to fix seals that are shrunk like Atp at 205 reseal also bars leaks rear main seal repair then we can use stp high mileage oil treatment. I will try to see if oil stop leak works with Lubegard seal fixx or blue devil rear main sealer.