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Mustang Forums
2012-2013 Boss 302 Mustang
motorcraft 5W50 replaced by Mobil 1 by ford?
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<blockquote data-quote="UnleashedBeast" data-source="post: 13698419" data-attributes="member: 112023"><p>This guy is asking the right question!</p><p></p><p>TRDon, the short answer is simple. The Boss was built for track use, and Ford intends it to be used as such. Therefore, the recommendation of a very viscous lubricant which will maintain an <em><strong>acceptable</strong></em> High temp High shear viscosity when lubricant temps reach 300*F.</p><p></p><p>HT/HS rating is the viscosity of a lubricant at 150*C (302*F) and it gets this hot around the pistons at WOT. </p><p></p><p>Road Course racing doesn't require a manditory 50 grade. It depends on the HT/HS rating of the lubricant, fluid temps, and fluid pressure. True Synthetic 10W-40 lubricants have been getting the job done just fine in all Ford Modular engines on the road course. Oil pressure is perfect on the street with 30 grade lubricants in the Roadrunner.</p></blockquote><p></p>
[QUOTE="UnleashedBeast, post: 13698419, member: 112023"] This guy is asking the right question! TRDon, the short answer is simple. The Boss was built for track use, and Ford intends it to be used as such. Therefore, the recommendation of a very viscous lubricant which will maintain an [I][B]acceptable[/B][/I] High temp High shear viscosity when lubricant temps reach 300*F. HT/HS rating is the viscosity of a lubricant at 150*C (302*F) and it gets this hot around the pistons at WOT. Road Course racing doesn't require a manditory 50 grade. It depends on the HT/HS rating of the lubricant, fluid temps, and fluid pressure. True Synthetic 10W-40 lubricants have been getting the job done just fine in all Ford Modular engines on the road course. Oil pressure is perfect on the street with 30 grade lubricants in the Roadrunner. [/QUOTE]
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2012-2013 Boss 302 Mustang
motorcraft 5W50 replaced by Mobil 1 by ford?
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