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Old 02-21-2002, 11:23 AM
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pmizell pmizell is offline
Benz Zealot
Join Date: Jun 2001
Location: Houston, Texas
Posts: 838
I gotta back Moe on this one. On high mileage engines, switching to synthetic could be a bad thing -- you will probably spring an oil leak somewhere where you didn't have it before. The M103's are good for 300k+ miles easily, no matter what type of oil you run in it -- as long as you change it regularly.

How many miles on the engine?


'91 300E, 207k miles (20w 50 Pennzoil)
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