Rear diff Lube

magpiemini · 05-02-2012, 11:24 AM

For racing should I use a higher viscosity like 75-140?

No one has mentioned Valvoline GL5, is it good to use in the diff and transmission of a 1984 GSL-SE?

cewrx7r1 · 05-23-2012, 10:27 AM

For the diff a good choice would be Amsoil Sevear Wear 75W-110.
For the trans Redline 75W-90NS is GL5 which is better than the GL4 MT90.

You have to consider that many of us are many a lot more power than the stock system.
Just as we need better cooling we need better lubrication.

Rot · 11-07-2012, 01:06 AM

Have you looked into Amsoil! I'm currently using it in my 85 gsl-se and 91 turboII. Both my trannys also (turboII both) Awesome oil no complaints. check your year S4 or S5. Amsoil GL-4(thinner) GL-5 (thicker).

05-02-2012, 11:24 AM	#31
magpiemini Rotary Fan in Training Join Date: Mar 2012 Location: Escondido, Ca iTrader: (0) Posts: 75 Rep Power: 13	For racing should I use a higher viscosity like 75-140? No one has mentioned Valvoline GL5, is it good to use in the diff and transmission of a 1984 GSL-SE? __________________ 1984 RX7 GSL-SE Building for the 24 Hours Of Lemons

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05-23-2012, 10:27 AM	#32
cewrx7r1 The Judge Join Date: Feb 2008 iTrader: (0) Posts: 196 Rep Power: 17	For the diff a good choice would be Amsoil Sevear Wear 75W-110. For the trans Redline 75W-90NS is GL5 which is better than the GL4 MT90. You have to consider that many of us are many a lot more power than the stock system. Just as we need better cooling we need better lubrication.

11-07-2012, 01:06 AM	#33
Rot The Newbie Join Date: Aug 2012 iTrader: (0) Posts: 13 Rep Power: 0	Have you looked into Amsoil! I'm currently using it in my 85 gsl-se and 91 turboII. Both my trannys also (turboII both) Awesome oil no complaints. check your year S4 or S5. Amsoil GL-4(thinner) GL-5 (thicker).