Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community - FT86CLUB - View Single Post - Changing my gearbox fluid. Redline MTL or Redline MT-90 ?

daniloneil8 · 08-23-2021, 06:27 PM

Changing my gearbox fluid.
GL4

Redline MTL or Redline MT-90 ?

Spec is
Toyota MT Gear Oil Spce.II GL-3
75W-90

Redline MT-90 vs. MTL
• MTL is a low 75W, almost a 70W, at very low temperatures and a high 80W, nearly an 85W, at elevated temperatures, providing adequate viscosity to prevent wear and deaden gear noise.
• MT-90 is a thicker 75W90 version of MTL. ... MT-90 is a 75W90 GL-4 and also satisfies motor oil viscosities SAE 10W/15W/40.

So, should I go with 70W85 or 75W90 ?
Easier cold shifting with the lighter MTL?

08-23-2021, 06:27 PM	#1
daniloneil8 Senior Member Join Date: Jan 2020 Drives: 2013 BRZ Location: USA Posts: 123 Thanks: 2 Thanked 35 Times in 27 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	Changing my gearbox fluid. Redline MTL or Redline MT-90 ? Changing my gearbox fluid. GL4 Redline MTL or Redline MT-90 ? Spec is Toyota MT Gear Oil Spce.II GL-3 75W-90 Redline MT-90 vs. MTL • MTL is a low 75W, almost a 70W, at very low temperatures and a high 80W, nearly an 85W, at elevated temperatures, providing adequate viscosity to prevent wear and deaden gear noise. • MT-90 is a thicker 75W90 version of MTL. ... MT-90 is a 75W90 GL-4 and also satisfies motor oil viscosities SAE 10W/15W/40. So, should I go with 70W85 or 75W90 ? Easier cold shifting with the lighter MTL?