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2012-2013 Boss 302 Mustang
Something to consider when the oil change topic happens here
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<blockquote data-quote="UnleashedBeast" data-source="post: 14255440" data-attributes="member: 112023"><p>Thank you Swiss, I just didn't have the energy to do it anymore.</p><p></p><p></p><p></p><p>Actually, my comment meant, I would no longer debate it with Grant, as the conversation was going nowhere. Swiss picked up where I left off, and doing an excellent job. He is saying it better than I said it myself.</p><p></p><p></p><p></p><p>Using the math from BITOG as well, I estimated MC 5W-50 to have sub 4.0 HT/HS after shearing. Amsoil 10W-40 HT/HS is in the 4.3 range virgin, shearing about 2.5 to 5% after thousands of miles of use. </p><p></p><p></p><p></p><p>Viscosity Improving Polymers, or "VI". Motorcraft 5W-50 is loaded with them, and why the formulation rapidly shears to a light 40 grade, heavy 30 grade lubricant in the 1,500 to 2,000 mile range (street driven). HT/HS shears an estimated 50% less than cSt @ 100*C, as stated above. I can assure you, when Motorcraft 5W-50 shears, Amsoil 10W-40 at the same mileage will have a higher HT/HS. Both formulations in virgin form, I'd give the higher HT/HS to Motorcraft. The problem is, that doesn't last long.</p></blockquote><p></p>
[QUOTE="UnleashedBeast, post: 14255440, member: 112023"] Thank you Swiss, I just didn't have the energy to do it anymore. Actually, my comment meant, I would no longer debate it with Grant, as the conversation was going nowhere. Swiss picked up where I left off, and doing an excellent job. He is saying it better than I said it myself. Using the math from BITOG as well, I estimated MC 5W-50 to have sub 4.0 HT/HS after shearing. Amsoil 10W-40 HT/HS is in the 4.3 range virgin, shearing about 2.5 to 5% after thousands of miles of use. Viscosity Improving Polymers, or "VI". Motorcraft 5W-50 is loaded with them, and why the formulation rapidly shears to a light 40 grade, heavy 30 grade lubricant in the 1,500 to 2,000 mile range (street driven). HT/HS shears an estimated 50% less than cSt @ 100*C, as stated above. I can assure you, when Motorcraft 5W-50 shears, Amsoil 10W-40 at the same mileage will have a higher HT/HS. Both formulations in virgin form, I'd give the higher HT/HS to Motorcraft. The problem is, that doesn't last long. [/QUOTE]
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2012-2013 Boss 302 Mustang
Something to consider when the oil change topic happens here
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