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Ask Mobil Archive -
Leaking Seals
DateQuestionAnswer
05/05/2007
Will Mobil 1 High Mileage Help or Contribute to Leaking Seals?
I am considering using Mobil 1 High Mileage in my 1995 Dodge Ram (125,000 miles). It has been well maintained, but it does have a tiny rear main seal leak. It doesn't change the level on the dipstick;...
With seal leaks it is a little bit of a roll of the dice. If the seal has just shrunk, the seal swell additives in Mobil1 High Mileage can actually help re-swell the seal and help to reduce or stop th...
03/27/2007
Will Mobil 1 High Mileage Provide Benefits Compared to Conventional High Mileage Oil?
My Celica has a leaking problem, but not too serious, I am using conventional high mileage oil for my car, which is pretty good. I saw Mobil 1 has the new product Mobil 1 High Mileage 10W-30. Is it be...
We recommend switching to Mobil 1 High Mileage if conventional oil has been used in your engine.  Mobil 1 High Mileage contains seal swell that will help eliminate leakage.
12/11/2006
Will Higher Mileage Vehicles Leak More When Switched to Synthetic Oil?
I've always heard that higher mileage vehicles will be more prone to oil leaks if one changes from regular to fully synthetic. True or not?  My '97 Expedition has 101,000 miles with regular oil. What'...
Mobil 1 High Mileage is formulated with seal swells that will help eliminate leakage.  We recommend you switch to Mobil 1 High Mileage for your vehicle.  If your vehicle is not leaking now, switching ...
08/20/2006
Does Switch to Synthetics Cause 'Dry' Engines to Begin Leaking
There seems to be lots of disagreement across various web message boards about the effect of a late change to synthetic oil on engine seals -- all based on anecdotal experience. Is there any scientifi...
Synthetic oils meeting OEM (original equipment manufacturer) and Industry specifications do not cause leaks as they are tested to ensure that they are fully compatible with the elastomer materials fro...
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