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Originally Posted by lee polowczuk
Sorry to revisit this...
Changed the oil in my sons 300e 156k about 4 months ago.... Rotella 5w-40 synthetic.
This car never burned a drop in between dino changes (at 3k). I used 20w-50 dino.
I decided to change over to synthetic for the first time in September.... It has burned a quart and a half in 2700 miles..
What gives? I will go back to dino when it gets warm again.
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Yep, me too. Syn oil just makes it past rings, guides, seals much better than dino. It's a superior lubricant though. I mix half dino and half syn; or, do whatever ratio you want to achieve oil useage that you're willing to live with.