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2011-2014 Mustangs
2011-2014 Mustang Talk
2013 GT now takes 5w50??
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<blockquote data-quote="UnleashedBeast" data-source="post: 11786910" data-attributes="member: 112023"><p>Oil viscosity selection depends on more than just the engine, but how the engine will be used. For grocery getting, and obviously CAFE law standards, a 5W-20 grade could be used. For extended session road racing, obviously the lubricant is going to achieve a much higher heat threshold. This would require a more viscous lubricant. </p><p></p><p>5W-50 Motorcraft and Castrol Castrol rapidly shear to a lighter grade, so the option to use a superior true synthetic 10W-40 for road racing application is a far wiser selection. </p><p></p><p>5W-20 Motorcraft (and other brands) are less viscous that what I prefer when aggressive street driving and drag racing events occur. This is where 30 grade lubricants are the choice for me. A true synthetic 10W-30 has the cold flow performance of a lesser base stock 5W-30, yet far superior shear resistance. This means that it will be superior for use in street cars used above 32*F all year long (southern cars). For northern cars driven in harsh winter climates, started multiple times a day, I recommend a robust true synthetic 0W-30.</p><p></p><p>For the record, Mobil 1, Castrol and Pennzoil have been using highly refined petroleum in their mixtures for years. When I say "true synthetic", the main brand big oil bottles on the shelf are NOT what I'm referring to. </p><p></p><p>For you computer programmers out there. . . </p><p></p><p>int Mobile 1, Castrol, Pennzoil != 100% true synthetic *obviously this would create an error, but you get the point*</p></blockquote><p></p>
[QUOTE="UnleashedBeast, post: 11786910, member: 112023"] Oil viscosity selection depends on more than just the engine, but how the engine will be used. For grocery getting, and obviously CAFE law standards, a 5W-20 grade could be used. For extended session road racing, obviously the lubricant is going to achieve a much higher heat threshold. This would require a more viscous lubricant. 5W-50 Motorcraft and Castrol Castrol rapidly shear to a lighter grade, so the option to use a superior true synthetic 10W-40 for road racing application is a far wiser selection. 5W-20 Motorcraft (and other brands) are less viscous that what I prefer when aggressive street driving and drag racing events occur. This is where 30 grade lubricants are the choice for me. A true synthetic 10W-30 has the cold flow performance of a lesser base stock 5W-30, yet far superior shear resistance. This means that it will be superior for use in street cars used above 32*F all year long (southern cars). For northern cars driven in harsh winter climates, started multiple times a day, I recommend a robust true synthetic 0W-30. For the record, Mobil 1, Castrol and Pennzoil have been using highly refined petroleum in their mixtures for years. When I say "true synthetic", the main brand big oil bottles on the shelf are NOT what I'm referring to. For you computer programmers out there. . . int Mobile 1, Castrol, Pennzoil != 100% true synthetic *obviously this would create an error, but you get the point* [/QUOTE]
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2011-2014 Mustang Talk
2013 GT now takes 5w50??
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