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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: 14225947" data-attributes="member: 112023"><p>Ticking time bomb? You use Motorcraft 5W-50, yet call any true synthetic 10W-40 use on the track a ticking tomb bomb? </p><p></p><p>Post up your UOA after 4 hours of high RPM track use, let's see how rapidly it sheared. I'd love to see it. </p><p></p><p>Question, if it shears to a 40 grade lubricant within your testing parameters, what does that mean to you?</p><p></p><p></p><p></p><p>To clarify, engineers do not always get final word in a decision process. For example, a reliability testing engineer with the 4.6L 3 valve engine, after 100 tear down tests, noticed Motorcraft 5W-30 was performing better in the engine than Motorcraft 5W-20. Wear was reduced. However, the bean counters feared fines from the Federal Government for CAFE laws, deciding on the 5W-20 recommendation anyway. Why you ask, because 5W-20 still allowed this engine to perform far outside the warranty period and the slight increase in fuel economy would reduce CAFE fines. This is not saying that a premium 5W-20 lubricant in a grocery getting grandma driving Mustang would not achieve 300k+ miles. It's simply more towards the performance junkie. This engineer recommended Ford stick with the Motorcraft 5W-30 requirement, or equivalent. Upper management didn't agree.</p><p></p><p></p><p></p><p>No, I simply meant that the lubricant would likely shear outside of the grade during the first or second weekend of use. HT/HS would no longer be in the 4.9-5.0 range a 50 grade lubricant provides. True synthetic 10W-40 lubricants hold in the 4.3 range. 30 grade lubricants drop to the 2.9-3.1 range. Motorcraft 5W-50 HT/HS is estimate to be in the 3.5 range after 1,500 miles of use. cSt @ 100*C averages in the 13.x range after this many miles. </p><p></p><p>Also, a lighter lubricant releases heat more rapidly than a more viscous lubricant. This will REDUCE your oil sump temps, therefore allowing the less viscous lubricant to maintain a higher HT/HS rating on average than a more viscous lubricant. In easy terms, Amsoil 10W-40 would maintain it's HT/HS raiting at the high end of it's average. The more viscous Motorcraft 5W-50 would maintain it's rating at the lower end of its average. This would allow their HT/HS ratings to be closer than what actually shows on the specification sheet. </p><p></p><p></p><p></p><p>Most Boss track owners are terrified of doing anything other than what Ford says, despite science. I've chatted with racing experts before, and their knowledge is vast.....right up until you try to discuss lubrication technology. The extent of their knowledge is....."I use this because XYZ said I have too." or "I use this because it's what I am sponsored with."</p><p></p><p></p><p></p><p>Bingo, bearing clearances. Translation, on the street....5W-50 is NOT required. You can use Ford's recommended 5W-20 if you wanted too, since the high levels of heat common on closed course will not be present. All local Boss 302 cars in my area, street use only, are rocking Amsoil ATM 10W-30. The engine starts easier, get's better efficiency & power output, and wear decreased.</p><p></p><p>and to all those who think "Automotive company engineers know best, I always listen to them first". Do you really think they are always right and have the best solution for a design? If that were the case, this would not be happening to the 5th generation Camaro. Sometimes, they have to work with what they have, not what they wanted or asked for. (i.e. Motorcraft 5W-50)</p><p></p><p><a href="http://jalopnik.com/this-is-how-hard-you-have-to-hit-a-camaro-key-to-turn-i-1590538077" target="_blank">Video and article link</a></p></blockquote><p></p>
[QUOTE="UnleashedBeast, post: 14225947, member: 112023"] Ticking time bomb? You use Motorcraft 5W-50, yet call any true synthetic 10W-40 use on the track a ticking tomb bomb? Post up your UOA after 4 hours of high RPM track use, let's see how rapidly it sheared. I'd love to see it. Question, if it shears to a 40 grade lubricant within your testing parameters, what does that mean to you? To clarify, engineers do not always get final word in a decision process. For example, a reliability testing engineer with the 4.6L 3 valve engine, after 100 tear down tests, noticed Motorcraft 5W-30 was performing better in the engine than Motorcraft 5W-20. Wear was reduced. However, the bean counters feared fines from the Federal Government for CAFE laws, deciding on the 5W-20 recommendation anyway. Why you ask, because 5W-20 still allowed this engine to perform far outside the warranty period and the slight increase in fuel economy would reduce CAFE fines. This is not saying that a premium 5W-20 lubricant in a grocery getting grandma driving Mustang would not achieve 300k+ miles. It's simply more towards the performance junkie. This engineer recommended Ford stick with the Motorcraft 5W-30 requirement, or equivalent. Upper management didn't agree. No, I simply meant that the lubricant would likely shear outside of the grade during the first or second weekend of use. HT/HS would no longer be in the 4.9-5.0 range a 50 grade lubricant provides. True synthetic 10W-40 lubricants hold in the 4.3 range. 30 grade lubricants drop to the 2.9-3.1 range. Motorcraft 5W-50 HT/HS is estimate to be in the 3.5 range after 1,500 miles of use. cSt @ 100*C averages in the 13.x range after this many miles. Also, a lighter lubricant releases heat more rapidly than a more viscous lubricant. This will REDUCE your oil sump temps, therefore allowing the less viscous lubricant to maintain a higher HT/HS rating on average than a more viscous lubricant. In easy terms, Amsoil 10W-40 would maintain it's HT/HS raiting at the high end of it's average. The more viscous Motorcraft 5W-50 would maintain it's rating at the lower end of its average. This would allow their HT/HS ratings to be closer than what actually shows on the specification sheet. Most Boss track owners are terrified of doing anything other than what Ford says, despite science. I've chatted with racing experts before, and their knowledge is vast.....right up until you try to discuss lubrication technology. The extent of their knowledge is....."I use this because XYZ said I have too." or "I use this because it's what I am sponsored with." Bingo, bearing clearances. Translation, on the street....5W-50 is NOT required. You can use Ford's recommended 5W-20 if you wanted too, since the high levels of heat common on closed course will not be present. All local Boss 302 cars in my area, street use only, are rocking Amsoil ATM 10W-30. The engine starts easier, get's better efficiency & power output, and wear decreased. and to all those who think "Automotive company engineers know best, I always listen to them first". Do you really think they are always right and have the best solution for a design? If that were the case, this would not be happening to the 5th generation Camaro. Sometimes, they have to work with what they have, not what they wanted or asked for. (i.e. Motorcraft 5W-50) [URL="http://jalopnik.com/this-is-how-hard-you-have-to-hit-a-camaro-key-to-turn-i-1590538077"]Video and article link[/URL] [/QUOTE]
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