It was confirmed that I had a small rear main seal leak on a 2008 Dodge Grand Caravan with 67k 3.3L. I've always ran Castrol 5w20 and started noticing consumption around 2 oil changes ago. It leaks around 1/4-1/2 quart in 3000 miles. I am just trying to slow the consumption. I took the van to the Dodge Dealership and they were not able to find a leak. I'd like opinions and comments on the best high mileage oil that could help out with a POSSBILE rear main seal leak. Any recommendations? I
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