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2012-2013 Boss 302 Mustang
Official GT 5.0/Boss 302 UOA thread
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<blockquote data-quote="UnleashedBeast" data-source="post: 11152968" data-attributes="member: 112023"><p>The wear metals of your dad's car would be considered normal since this is break in engine wear. </p><p></p><p>Silicon levels are MUCH lower than any Shelby 5.4L engine on the factory fill. Our cars have 300+ ppm from the factory fill. Looks like this engine should have very low silicon numbers after engine break in is complete and good air filtration is used. </p><p></p><p>Manganese is kind of odd to me, as I've never seen this high of concentration unless a fuel octane booster additive was used. Although, since the fuel dilution is ~1%, that could account for it. </p><p></p><p>Viscosity is where you will see me hate on Motorcraft 5W-50. So many owners believe they MUST use a 50 weight lubricant in their engine, yet the oil Ford recommends easily shears to a light 40 grade/heavy 30 grade during use. This sample sheared to a light 40 grade (14.2 cSt - virgin was 19.9 - a 28% viscosity decrease). This is why true synthetic 10W-40 lubricants are outperforming Motorcraft 5W-50. They shear very little and provide far less friction. This improves engine efficiency, throttle response, mpg, and power. Why choose a lubricant that will shear giving you less performance when you can use a lubricant that will shear very little (less than 5%), reduce wear, and provide greater efficiency? </p><p></p><p>TBN: Total Base Number - Detergent additives that prevent the lubricant from becoming acidic and eating the internals of an engine. Motorcraft 5W-50 with 3900 miles of use shows a TBN of 3.17. Using your and other Shelby reports with MC 5W-50, I've concluded that this is a 7,500 mile use oil at best. I honestly don't recommend using it beyond that point. Sure, the extra 2 quarts of oil in the Boss versus the Shelby will give it a longer use, but I don't trust it. It's too cheap of insurance just to change it to be SURE your oil is protecting the engine. </p><p></p><p>Ignore oxidation testing...as I have yet to see it be a reliable testing method unless the same oil in a virgin state was used to set up the testing machine first.</p></blockquote><p></p>
[QUOTE="UnleashedBeast, post: 11152968, member: 112023"] The wear metals of your dad's car would be considered normal since this is break in engine wear. Silicon levels are MUCH lower than any Shelby 5.4L engine on the factory fill. Our cars have 300+ ppm from the factory fill. Looks like this engine should have very low silicon numbers after engine break in is complete and good air filtration is used. Manganese is kind of odd to me, as I've never seen this high of concentration unless a fuel octane booster additive was used. Although, since the fuel dilution is ~1%, that could account for it. Viscosity is where you will see me hate on Motorcraft 5W-50. So many owners believe they MUST use a 50 weight lubricant in their engine, yet the oil Ford recommends easily shears to a light 40 grade/heavy 30 grade during use. This sample sheared to a light 40 grade (14.2 cSt - virgin was 19.9 - a 28% viscosity decrease). This is why true synthetic 10W-40 lubricants are outperforming Motorcraft 5W-50. They shear very little and provide far less friction. This improves engine efficiency, throttle response, mpg, and power. Why choose a lubricant that will shear giving you less performance when you can use a lubricant that will shear very little (less than 5%), reduce wear, and provide greater efficiency? TBN: Total Base Number - Detergent additives that prevent the lubricant from becoming acidic and eating the internals of an engine. Motorcraft 5W-50 with 3900 miles of use shows a TBN of 3.17. Using your and other Shelby reports with MC 5W-50, I've concluded that this is a 7,500 mile use oil at best. I honestly don't recommend using it beyond that point. Sure, the extra 2 quarts of oil in the Boss versus the Shelby will give it a longer use, but I don't trust it. It's too cheap of insurance just to change it to be SURE your oil is protecting the engine. Ignore oxidation testing...as I have yet to see it be a reliable testing method unless the same oil in a virgin state was used to set up the testing machine first. [/QUOTE]
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Official GT 5.0/Boss 302 UOA thread
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