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SVTPerformance's Chain of Restaurants
The Distillery
E85 eating main bearings???
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<blockquote data-quote="UnleashedBeast" data-source="post: 11427279" data-attributes="member: 112023"><p>Malcolm, </p><p></p><p>Until winter temps drop below 0*F, and you are constantly cold starting the car in these extreme temperatures, a true synthetic 10W-30 will be no problem. I prefer above 32*F myself. </p><p></p><p>The largest misconception about engine lubricants is SAE grade numbers used to classify lubricants. If you look at two lubricants, same or different brand, you will ALWAYS assume that 5W-30 is thinner than 10W-30. At least, those who don't know any different do. At operating temperatures, they are both the same weight, or at least very close depending on brand. </p><p></p><p>The difference is how much they thicken when the fluid cools. Again, the first number denotes "cold" or "winter" weight, hence the "W". However, this number is the most misleading. Looking at the number alone, you would assume that the oil is thinner when it cools because obviously 5 (or 10) is less than 30, when in fact, it's the opposite. </p><p></p><p>Then it comes to the overall formulation. Different base stocks will take a different approach to a final formulation. Since true synthetics naturally thicken less than petroleum base stocks, the formulation method is very different. </p><p></p><p>Let's see how they vary. </p><p></p><p>True synthetic base stocks can use a natural 30 grade base lubricant as the starting point, and normally...no viscosity improving polymers are added (especially in 10W-30 lubricants). The fluid naturally thicken less and doesn't require the use of VII (viscosity improving polymers) to prevent the fluid from thinning at operating temperatures less than the 30 grade, since a 30 grade was used as the base stock. </p><p></p><p>Petroleum base lubricants have to take a different approach. Since they don't have as good of natural cold flow performance, VIIs are required. The formulators will select a lighter base stock for better cold flow performance. To prevent the fluid from thinning past the 30 grade, the VIIs are used to prevent thinning. These polymers expand when heated, and increase viscosity at higher temperatures. This allows a lighter base stock to be used, but still keep the desired 30 grade during normal operation. </p><p></p><p>Now, what's the downfall of petroleum's method? SHEARING!!!</p><p></p><p>VII's wear down fast. The base stock, once all VIIs are used up, will naturally return to the lubricants 20 grade base stock performance. It no longer has the expanding polymers to maintain a 30 grade lubricant.</p><p></p><p>This is why I love true synthetic 10W-30. It has very good cold flow performance for southern winters, uses zero VII, and will not shear.</p><p></p><p>Final thoughts. Do not classify Mobil 1 syn as a true synthetic. Exxon Mobil uses a blend of highly refined petroleum and true synthetic. The mixture percentages I do not know precisely, but you are not buying 100% true synthetic lubricant like Exxon Mobil wants you to believe. They use a refined petroleum base stock called VISOM. </p><p></p><p>In all fairness to Mobil 1, all the other big boys do it too. Pennzoil, Castrol, Motorcraft, etc...</p></blockquote><p></p>
[QUOTE="UnleashedBeast, post: 11427279, member: 112023"] Malcolm, Until winter temps drop below 0*F, and you are constantly cold starting the car in these extreme temperatures, a true synthetic 10W-30 will be no problem. I prefer above 32*F myself. The largest misconception about engine lubricants is SAE grade numbers used to classify lubricants. If you look at two lubricants, same or different brand, you will ALWAYS assume that 5W-30 is thinner than 10W-30. At least, those who don't know any different do. At operating temperatures, they are both the same weight, or at least very close depending on brand. The difference is how much they thicken when the fluid cools. Again, the first number denotes "cold" or "winter" weight, hence the "W". However, this number is the most misleading. Looking at the number alone, you would assume that the oil is thinner when it cools because obviously 5 (or 10) is less than 30, when in fact, it's the opposite. Then it comes to the overall formulation. Different base stocks will take a different approach to a final formulation. Since true synthetics naturally thicken less than petroleum base stocks, the formulation method is very different. Let's see how they vary. True synthetic base stocks can use a natural 30 grade base lubricant as the starting point, and normally...no viscosity improving polymers are added (especially in 10W-30 lubricants). The fluid naturally thicken less and doesn't require the use of VII (viscosity improving polymers) to prevent the fluid from thinning at operating temperatures less than the 30 grade, since a 30 grade was used as the base stock. Petroleum base lubricants have to take a different approach. Since they don't have as good of natural cold flow performance, VIIs are required. The formulators will select a lighter base stock for better cold flow performance. To prevent the fluid from thinning past the 30 grade, the VIIs are used to prevent thinning. These polymers expand when heated, and increase viscosity at higher temperatures. This allows a lighter base stock to be used, but still keep the desired 30 grade during normal operation. Now, what's the downfall of petroleum's method? SHEARING!!! VII's wear down fast. The base stock, once all VIIs are used up, will naturally return to the lubricants 20 grade base stock performance. It no longer has the expanding polymers to maintain a 30 grade lubricant. This is why I love true synthetic 10W-30. It has very good cold flow performance for southern winters, uses zero VII, and will not shear. Final thoughts. Do not classify Mobil 1 syn as a true synthetic. Exxon Mobil uses a blend of highly refined petroleum and true synthetic. The mixture percentages I do not know precisely, but you are not buying 100% true synthetic lubricant like Exxon Mobil wants you to believe. They use a refined petroleum base stock called VISOM. In all fairness to Mobil 1, all the other big boys do it too. Pennzoil, Castrol, Motorcraft, etc... [/QUOTE]
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E85 eating main bearings???
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