Oil and Oil Related TopicsA place to post your oil related questions and comments
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Just so I can be better educated, can you describe in depth what this shearing resistance is you are describing? I am not familiar with the term and how a fluid can resist shearing forces. Forgive me, when I think of shearing forces, I think of solids (the ultimate form of shearing force resistance, at least until the material fails).
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Let's say a lubricant is formulated to be a 30W at 100*C, but as the additive pack and base stock break down after many miles of use the oil thins to a 20W oil. This is called shearing.
100% true synthetics resist shearing much better than a petroleum (group III) based oil due to the superior PAO group IV base stock and additive pack. Just another reason why you have much longer drain intervals of a true synthetic.
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Remember all oils are formulated differently. A thin 30-weight is more likely to drop to a 20-weight with just a little bit of shearing. A thick 30-weight will have a longer way to go before it thins, if at all.
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K found it. Great write up I will be switching back to 0w30. If you weren't aware if you register with amsoil they will recognize you as a preferred customer and sell everything they supply at wholesale. But from the wealth of knowledge you possess I will assume you are already a dealer
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Great info! thanks for the work, but a few questions for you...
Am I correct in assuming that the same concept applies to my 5.0 engine? and also I assume that any full synthetic, Amsoil, Royal purple, etc.. will have the same effect on performance?
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