any recommendations for the following.
GL-5 Limited Slip rear axle differential
Isuzu recommends 80W-90 up to 86F and 80W-140 over 100F (off the chart).
We had 31 days in the 90's this summer. Doesn't get below 10F
Royal purple Maxgear 75W-140 has the modifier already. Seems good but overkill and $21 / qt
I was thinking either
Mobil synthetic 75W-90
or
Lucas 80W-90
Also any recommendations on friction modifier?
Thanks
Alan
GL-5 Limited Slip rear axle differential
Isuzu recommends 80W-90 up to 86F and 80W-140 over 100F (off the chart).
We had 31 days in the 90's this summer. Doesn't get below 10F
Royal purple Maxgear 75W-140 has the modifier already. Seems good but overkill and $21 / qt
I was thinking either
Mobil synthetic 75W-90
or
Lucas 80W-90
Also any recommendations on friction modifier?
Thanks
Alan