Amsoil SVG 75-90 or 75-110

[aquariuscsm]

I`m using Amsoil 80W90(which is what my car specs via factory fsm). I wonder if 75W110 would be better,or if I should just stick with the oem spec of 80W90?

 

[gtx510]

Originally Posted By: JHZR2
Originally Posted By: chefwong
OEM spec for my differential is 75W90



ON BMWs? I thin xj, a 75w-140 is spec for all installs, definitely at least all LSDs.

http://www.castrol.com/castrol/genericsection.do?categoryId=8290001&contentId=6007488
most bimmers take SAF-XO 75W-90
lsd diff's use SAF-XJ 75W-140

 

[gtx510]

Originally Posted By: aquariuscsm
I`m using Amsoil 80W90(which is what my car specs via factory fsm). I wonder if 75W110 would be better,or if I should just stick with the oem spec of 80W90?

comparing the old and new viscosity charts
isn't 75W-110 closer to the 212*F viscosity of 80W-90?
and 75W-90 is a touch thinner than 80W-90?

 

[Pablo]

Originally Posted By: gtx510
Originally Posted By: aquariuscsm
I`m using Amsoil 80W90(which is what my car specs via factory fsm). I wonder if 75W110 would be better,or if I should just stick with the oem spec of 80W90?

comparing the old and new viscosity charts
isn't 75W-110 closer to the 212*F viscosity of 80W-90?
and 75W-90 is a touch thinner than 80W-90?


Yes. That's my point.

 

[chefwong]

Just recapping...

If going with 110 SVG over OEM spec of 90 vs OEM fluid - Castrol SAF-XO, with the higher viscos. differential fluid, how much ~hotter~ will the diffy run . Non LSD fluid

 

[unDummy]

You'd have to put a temp gauge on it and find out yourself. There is no answer. Could even run cooler. Depends on diff.