RP 75w/140 vs 75w/90 for diff change
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From: Lancaster, New York
RP 75w/140 vs 75w/90 for diff change
Just purchased 3qts Royal Purple 75w/140 for my 8.8 differential oil change.(According to AM web page, and the recommendation of a thread on this forum)
Now other forums recommend 75w/90 for the 2007 GT, and after speaking to an AM rep, they say that it should be the 75w/90. What would the difference be if I ran the 140 instead?? Also.. AM says NO additive required...BUT others say to add it anyway... What should I do???
Now other forums recommend 75w/90 for the 2007 GT, and after speaking to an AM rep, they say that it should be the 75w/90. What would the difference be if I ran the 140 instead?? Also.. AM says NO additive required...BUT others say to add it anyway... What should I do???
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DerekShiekhi
2015 - 2023 MUSTANG
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Sep 30, 2015 06:59 AM