E320 Rear Main Seal Leak stopped with Mobil 1 10w40 High Mileage Oil

[SUNRG]

I have a 2001 Mercedes E320 with over 280,000 miles, it had a small RMS leak and I tried adding 2 cans (600ml) of LM Motor Oil Saver to the 0w40 that was in the engine. Small RMS leak remained.

A few thousand miles later it was time to change the oil again, that time I installed 4 quarts of M1 5w40 Turbo Diesel Truck, 4.5 of M1 0w40 and 2 cans (600ml) LM Motor Oil Saver ... still the small RMS leak remained.

However, on this last change I switched to M1 10w40 High Mileage *and* added 2 cans (600ml) of LM Motor Oil Saver, and ... totally dry driveway, no more RMS leak.

I think M1 10w40 High Mileage by itself may have been the solution to my RMS problem. The LM Motor Oil Saver was in for almost 15,000 miles on the previous two fills and alone it didn't do the trick.

2 days after M1 High Mileage 10w40 goes in and dry driveway.

Before:


After: