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2012-2013 Boss 302 Mustang
motorcraft 5W50 replaced by Mobil 1 by ford?
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<blockquote data-quote="kcbrown" data-source="post: 13346574" data-attributes="member: 153731"><p>Seems my messages need to be moderated prior to appearing, so I can't (yet) edit my last message for clarification, as it hasn't appeared at the time I write this.</p><p></p><p>The reason I'm concerned about this is that if RL 5W50 is causing excessive levels of lead wear in GT500s, then it's important to, firstly, know why it is and, secondly, to avoid using oils with the same causal characteristic.</p><p></p><p>Hence, the question about UOAs of GT500s that are using Motorcraft 5W50. I get that it shears to a lighter weight oil and that 50 weight isn't really required for street use, but because it starts off with (roughly) the same weight as RL 5W50, it follows that there should be some period of time during which the engine will be running with oil of (roughly) the same viscosity as what is supplied by RL under the same conditions.</p><p></p><p>I suppose if the MC oil shears to a lighter weight oil quickly enough, the lead wear will wind up being in the noise (if indeed viscosity is the root cause of said wear)...</p><p></p><p></p><p>If there is some other root cause of the lead wear in GT500s running with RL 5W50, then that surely needs to be identified and made known, no?</p></blockquote><p></p>
[QUOTE="kcbrown, post: 13346574, member: 153731"] Seems my messages need to be moderated prior to appearing, so I can't (yet) edit my last message for clarification, as it hasn't appeared at the time I write this. The reason I'm concerned about this is that if RL 5W50 is causing excessive levels of lead wear in GT500s, then it's important to, firstly, know why it is and, secondly, to avoid using oils with the same causal characteristic. Hence, the question about UOAs of GT500s that are using Motorcraft 5W50. I get that it shears to a lighter weight oil and that 50 weight isn't really required for street use, but because it starts off with (roughly) the same weight as RL 5W50, it follows that there should be some period of time during which the engine will be running with oil of (roughly) the same viscosity as what is supplied by RL under the same conditions. I suppose if the MC oil shears to a lighter weight oil quickly enough, the lead wear will wind up being in the noise (if indeed viscosity is the root cause of said wear)... If there is some other root cause of the lead wear in GT500s running with RL 5W50, then that surely needs to be identified and made known, no? [/QUOTE]
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2012-2013 Boss 302 Mustang
motorcraft 5W50 replaced by Mobil 1 by ford?
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