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2011 Forester and 0W 20 oil
I do all the maintenance and service on all my cars and trucks. For years I have run 10W-30 synthetic oil in all my cars and trucks for over 700,000 miles and no engine troubles of any kind.
My Subaru dealer has not given me any reasonable answer as to why this engine needs this thin 0w-20 oil. What could possible be so different about this engine out of 100s of millions of engines that it requires this oil? The timing chain can't possible have anything to do with it.
What is so weak is that the service department person I talked with had no answer. "well it's a warranty requirement". Then he said the engine tolerances were so close it required this oil. I asked what parts and what tolerances, cam bearings, crank shaft bearings, what? He didn't have a clue. That's one service department that will never touch one of my cars.
Anyone out there have an idea. Is is just a thinner oil to reduce pump load with the idea of better millage which would be kind of lame.