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Synthetic Oil? 200

posted by  someone claiming to be 240 Fan on  Wed Mar 8 07:20 CST 2006 [RELATED]

I have two non-turbos: 1980 242 DL and 1989 245 DL that are daily drivers. Both have about 300k and 200k miles and head gasket replacement within the past year. I have owned both vehicles for 2 years and diligently cared for them (prior to that, they were in Washington State and Massachussets and relatively neglected).

My goals with considering synthetics are to prolong the engine life and clean up gunk. I've read Mobil 1's webpage, the list-serve, and FAQs and am confused about the risk of oil leaks on converting to synthetics. I've seen a few anecdotes about rear main seal leaks, which scares me because I really don't want to have to replace them.

Are my goals reasonable?

What is the risk of oil leaks?

If so, what grade would be good (5W-20 or 10W-30) for California (temps between 40'F and 80'F)?

Thanks in advance





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New Synthetic Oil? [200]
posted by  someone claiming to be 240 Fan  on Wed Mar 8 07:20 CST 2006 >


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