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Old 12-02-2002, 11:45 PM
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Joseph_H Joseph_H is offline
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Join Date: Nov 2002
Location: Texas
Posts: 231
You mean Mobil 1 20W-50 is petroleum-based vs Synthetic? if that is the case, then yes I am using the petroleum based. Actually the MB dealer did the last oil change.

The dealer recommends changing oil in 6 months or 7000 miles and I want to change it at 3500 intervals. Do you recommend changing oil filter after 3500 miles or wait until the 7000 miles?
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