Quote:
Originally Posted by AG1LE
Did you find a synthetic oil that works with the diff, or just stick with the Eaton recommended dino oil?
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I'm using Redline 75W90 NS (no friction modifier). I use it on both Miata (Quaife helical) and 1LE (Eaton Helical). The fact that Eaton has discouraged use of synthetic fluids, and the statement of "we just never tried it; we didn't need it" is laughable. They have finally changed their wording, and they now recommend synthetic (with no additives) if the car manufacturer also recommends.