What oil to use in my differential?

[bonito]

I was wondering what people put in the differentials (w/anti spin) on their 3G's.

Mine is due and Royal Purple, Mobil 1 I heard supposed to be good, true?



Thanks

 

[jnelson]

Amsoil, Mobil 1, Royal Purple are all great oils. Ive used Amsoil and Mobil 1 without a hitch for 580,000 miles on 2 different trucks and have had absolutely no problems.



Oil discussions around here is like discussing who makes the best chip, or the best aftermarket transmission. Its all personal preference>

 

[fkovalski]

I cannot say enough about fellow member Klenger's website --> HERE A lot of good info on general maintainance for when the rest comes due. Kudos, Ken!!



Agreed, oils are a personal preference so long as the specs are met, I used the Mobil synthetic in my diffs.

 

[klenger]

Thanks for the kind comments about the website. I use Mobil 1 because it's good stuff and easy to find.

 

[JGheen]

What weight of oil is recommended? 75W-90? 85W-140??



Joe

 

[fkovalski]

What weight of oil is recommended? 75W-90? 85W-140??



Joe

From my research and understanding: the former is the minimum recomendation specification. The latter is for "heavy duty" use. I'll let you determine your own definition of HD as it relates to your truck use.



I tow occasionally but have a truck camper on about 80% of my travels (on & off road. ) I 4WD about 50-75% (winter and summer use. ) i find the 75W-90 sufficient enough for my means.

 

[rbattelle]

Here's an interesting read . I believe the 75w-90 specifier is regardless of use. at least, that's what my owners manual states.



I run Valvoline Synpower, BTW. I'm getting ready to try a run of Kendall Elite (Interesting tidbit )



Whatever you choose, I'd be sure it's an API GL-5 grade full synthetic.



Ryan