Oil leak in a bad spot


#1

I have a 2001 Mercury Sable 174000 miles with a small rear main engine seal leak. about a quarter’s size of oil hits the ground a night. I have been using a synthetic blend for about 50000 miles. Should I change to high milage oil or one of these sealer products I see? Or let it alone, I am about a 1/2 quart to a a quart low at the 5000 oil change if I don’t add any.


#2

You can try one of the high mileage oils such as Valvoline Max Life. These have seal conditioners that slightly swell the seals to stop oil leaks.

The son has a Jeep that had a rear main seal leak. And when he started using the Max Life the leak stopped.

Tester


#3

Replacing the seal would be an expensive proposition at this point. You can buy an awfull lot of oil for the $1000 to pull the tranny and oil pan to replace the seal.
I’d opt for @Testers post and use a oil with seal conditioners or a high quality additive that should restore seals.

Yosemite


#4

Any risk when using the high mileage oil?

Is there any danger that it well cause havoc with seals that are currently in fine shape?


#5

If you are certain it is coming from the rear main seal, I’d just ignore it and put a pan on the garage/driveway floor to catch the oil drips where you park your car. With 174K, eventually , more likely sooner, either the clutch or automatic transmission will need a rebuild job, and then it’s a cheap and simple matter to install a new rear main seal.


#6

I’ve used high mileage oil on a car where some of the seals were new a fresh, but others were old and most likely hard and cracked. The seal conditioners did not harm the new seals and slowed down the leaking from the older seals.


#7

Oil leaks; why God made corrugated boxboard.


#8

I’ve noticed the parking spaces in the nearby apartment parking lot pretty much all have some oil stains showing. Stuff leaking from cars parked overnight remains a common thing.


#9

My wife’s old cookie sheets with kitty litter on them are the perfect oil catchers. Most cars start leaking oil as they age, and small leaks are tolerable. I only ever had to fix an oil leak as it became major; on the rear bearing seal of our 1994 Nissan Sentra. That cost $550 or so.