Color is a terrible indicator of lubricant health. Ask the folks at Blackstone Labs who do oil analysis. Ask the big rig owners who often go 15k-30k miles between changes based on periodic oil analysis. And their oil is “black” for all but the first few hundred miles after the change.
For the third time - no noises? Performing ok? No leaks? You’ve got a healthy diff with new fluid. DRIVE THE CAR.
If you still can’t let it go - buy some regular ol’ dino rear diff fluid. Change it again. Drive around for a week or two and then do a “hot change”. Then put another round of new synth in it. You’ll have the cleanest rear end in town. And who doesn’t want a clean rearend?
--
82 242-6.2L; '17 Mazda3; '16 Crosstrek
|