Ooo Great! More choices.

So IT is Redline VERSUS Royal Purple.
Which is better?? Equal may be?

I just put Redline MT-90 into my T100 manual trans.
Planning on putting same MT-90 into transfer case.

Planning on putting Redline 75W90 to both differentials.

NOT sure about 75W90NS eleet mention earlier (no friction modifiers).

How do I check the type of differentials: conventional or limited-slip?


As I mentioned above IÆm set on Redline at this time.
The problem is there is no Redline product on the shelf around my location (Western Mass).

And Royal Purple IS available.

I have found local store able to order Redline for me.
For example: 1 qt of MT-90 about $15.00
Royal Purple: 1 qt of Synchromax $12.59 in local NAPA.

So you would say stick to Royal Purple.

BUT, I have found this http://www.morethantires.com/Redline_Oil.html
Every qt about $9.95 with about $8.00 for shipping.
When if I buying large qty (4 qt for MT and transfer, 6 qt for both diff) IÆm adding less then a buck/qt.


Now for the last:
Owner manual recommends for Differential:
Front (oil viscosity)
SAE 75W-90
Rear
Above û(minus)18 Celsius
SAE 90

Am I still OK with Redline 75W90 for rear?


Thanks