DuraBlend gear oil

[timzak]

I noticed some not-so-positive comments in another thread about Valvoline's gear oil and am wondering if I did the right thing when I changed my differential fluid in February. The car is a '94 Mustang GT w/limited slip. Ford calls for 80W-90 and 4 oz of friction modifier, changed out every 100,000 miles. I used Valvoline DuraBlend 80W-90 and friction modifier (changed at 91K). Do I have anything to worry about? I'm not noticing any strange behavior so far in the rear end.

 

[labman]

Valvoline may not be the best, but I have been putting it in my truck for over 25 years. It is good enough that it is still the same truck 25 years later. It doesn't get much hard use.