1994 Buick LeSabre – oil leaking from rear seal

Dear Doctor: I own a 1994 Buick LeSabre with 110,000 miles and have taken very good care of it for the last six years of ownership. Unfortunately, I need the seal replaced (been adding 1 to 2 quarts of oil per week), which will be costly due to the transmission needing to be removed to put in the new seal. In the last three months I have added three bottles of Lukeoil Rear Main Seal stop leak, but it only has kept it at bay, not stopped it at all. I hope to only keep the car for another two years, if possible. Are there any dangers to driving with an oil leak? Sheila

Dear Sheila: Your Buick has low miles for car 16 years of age. Oil leaking from a rear seal will only get worse. There are no magic chemicals to stop a rear main oil seal leak — as you have found out. One suggestion is to have your technician check to make sure the PCV valve is actually working. As far as the frequent oil leak that you have, this does present a fire hazard and pollutes the street. If the transmission is not acting up, leave it alone. You like the car. I recommend you get the necessary repairs done.

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