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pwd72s pwd72s is online now
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Join Date: Apr 2001
Location: Linn County, Oregon
Posts: 48,908
Probably depends on the carmaker? I'm probably too old school. However, I'd suggest NOT going a heavier weight then it says on the fill cap. Oil passages designed for a specific weight type thing. Too heavy may slow flow.

That said, when I bought my '09 Mustang, I was told the factory fill was 5-20 motorcraft synthetic blend. No idea who makes it for ford. Manual said don't bother until 5,000. I dumped it at 750 miles, gave the car Castrol 5-20 dino oil to seat the rings, drove it for 1,000. Since then, mobil 1 5-20 every 5,000 or annually, which is usually less than 5,000. Car now has 29,400...I've yet to have to add oil.
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Old 04-21-2019, 10:25 AM
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