Datsun Roadster Forum-311s.org

Has anyone else tried both the Swepco and the Motorcraft in either an FS5C71A or FS5W71A?

A forum search yields many results for the Swepco, but none for the Motorcraft (made in Germany for Ford). Both are fully compatible with the two transmissions:

https://www.motorcraft.com/us/en_us/hom ... luids.html

So, PLEASE no responses that begin with, "Oh, I would never ..."

Thank you!

Jon

Really with the very polished speed gear tapers ,and worn sycro blocker rings ( that most 311s will have) a thinner fluid would be more of a plus , mitsu used basicly 30w non detergent oil in the Chrysler manual .
30 yrs ago many manuf.manual Trans went to friction material on the inside contact area of the blocker rings ,that the manuf. insist a friction modifiers is in it with there precise amount
For wear it's only really big LT trucks that it matters

Not both, but I have tried typical Valvoline and now Royal Purple... I miss the swepco and have been considering ordering some. It got dumped out by mistake.