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SVT Shelby GT500
5w50 mobil 1- good or bad
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<blockquote data-quote="6-Speed" data-source="post: 10877065" data-attributes="member: 65111"><p>Kinematic viscosity (KV) of the Motorcraft shears about 30% over 4000 to 6000 miles. I've seen data that suggests HTHS of oil shears about half as much percentage wise as its KV shears ... so about 15%. Assuming MC starts out with a HTHS of 3.7 cP means it will shear to 3.1 cP after 4 to 6K miles and even more after 7500 miles. I'm thinking the virgin MC 5W50 HTHS is slightly higher than 3.7 cP, but not by much. CP probably had to bump up the KV to the spec value of 21 cSt (nearly a 60 grade oil) in order to achieve the required 3.7 cP minimum HTHS ... just speculating.</p></blockquote><p></p>
[QUOTE="6-Speed, post: 10877065, member: 65111"] Kinematic viscosity (KV) of the Motorcraft shears about 30% over 4000 to 6000 miles. I've seen data that suggests HTHS of oil shears about half as much percentage wise as its KV shears ... so about 15%. Assuming MC starts out with a HTHS of 3.7 cP means it will shear to 3.1 cP after 4 to 6K miles and even more after 7500 miles. I'm thinking the virgin MC 5W50 HTHS is slightly higher than 3.7 cP, but not by much. CP probably had to bump up the KV to the spec value of 21 cSt (nearly a 60 grade oil) in order to achieve the required 3.7 cP minimum HTHS ... just speculating. [/QUOTE]
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