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SVTPerformance's Chain of Restaurants
The Greasy Spoon
Joe Gibbs oil
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<blockquote data-quote="Ben99GT" data-source="post: 12126550" data-attributes="member: 3519"><p>No one outside of XOM will be able to tell you for sure. I don't think you'll see much difference in types of base oils, as most Mobil 1 oils are apparently a blend of Group III/IV/V or III/V. XOM uses Group III+ Visom even in their 0W-40, which is sort of their halo oil, and XOM is apparently big on ANs as opposed to esters. </p><p></p><p>I'd wager a guess that the difference between M1 and M1 EP is the viscosity of the base oils and/or VII levels, with EP leaning towards slightly heavier base oils with a bit less VIIs (or just less VIIs period) to improve shear resistance. This might explain why M1 EP is a slightly thinner finished oil than M1 with a slightly lower VI yet a very similar HTHS viscosity. </p><p></p><p>Then M1 EP will have a slightly higher TBN.</p></blockquote><p></p>
[QUOTE="Ben99GT, post: 12126550, member: 3519"] No one outside of XOM will be able to tell you for sure. I don't think you'll see much difference in types of base oils, as most Mobil 1 oils are apparently a blend of Group III/IV/V or III/V. XOM uses Group III+ Visom even in their 0W-40, which is sort of their halo oil, and XOM is apparently big on ANs as opposed to esters. I'd wager a guess that the difference between M1 and M1 EP is the viscosity of the base oils and/or VII levels, with EP leaning towards slightly heavier base oils with a bit less VIIs (or just less VIIs period) to improve shear resistance. This might explain why M1 EP is a slightly thinner finished oil than M1 with a slightly lower VI yet a very similar HTHS viscosity. Then M1 EP will have a slightly higher TBN. [/QUOTE]
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SVTPerformance's Chain of Restaurants
The Greasy Spoon
Joe Gibbs oil
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