I've always used Mobil 1 in all my engines. Never an issue. I picked up a Mustang as a toy. The rear main seal leaks a bit. Leaks worse with 5w20. I put Mobil 1 5w30 and the leak has slowed down. After 5000 kms or 3000 miles the oil level was still at full. I just smell the oil when the car is idling a bit.
I've never used high mileage oil before. Is it worth trying? Pros/cons of high mileage oil?
I've never used high mileage oil before. Is it worth trying? Pros/cons of high mileage oil?