GL-4 , GL-5 synthetic gear oil : REDLINE MT-90 ...

[Pablo]

Originally Posted By: smokey1
Car is a 2008 Toyota Yaris. Also, is the SVG-GL-5 a non-corrosive gear oil for safe use in the Yaris? Last, can you do a blend of 1 quart of MTG (GL-4) and 1 quart of SVG (GL-5) for the Yaris? The owners manual calls for either GL-4 or GL-5 in a 75W-90.

Thanks


SVG is safe with all alloys used in the Yaris gearbox. Although not officially recommended, and no guarantees, you can blend the two.

 

[Bruce T]

I have a '97 V-6 Camry with the semi-rare manual transmission option. I've used Mobil 1 Synthetic Gear Lube, followed by Red Line MT-90. The Red Line eliminated the negative qualities of the Mobil 1 (shifting notchiness and transmission whine), so I'm happy enough with RL that I haven't tried Amsoil MTG yet. I live in a mixed climate (Oklahoma City), so I can't speak for Northern climates.

 

[wantin150]

Stick with the MTG if you want to use an Amsoil product. IMHO, stay away from the SVG for that gearbox. GL4, GL4, GL4, GL4. Just because you "can" use a GL5, doesn't mean you "should". My .02.

 

[Bruce T]

I agree with mechtech2, the best choices are Amsoil MTG and Red Line MT-90 (or the MT-90/MTL mix for notchy shifts or cold climates).

 

[kr_bitog]

Originally Posted By: Sportster2000
Since the RL 75W90NS is not corrosive and allow synchronizers work quicker because it doesn't contain friction modifiers. Will it be a better choice than a GL4 oil such as MT90 as it is not corrosive & offer better protection?


For street driving, I prefer MT90 because the FM will give smoother and more effortless shift feel.

For race, people may not care about the shift feel, so 75w90NS may give better protection.

Personally, I dont find I can shift quicker with 75W90NS compared with MT90.

 

[tdi-rick]

Originally Posted By: JohnBrowning
Redlines MTL/MT90 blend has almHardost legendary cult statis since it works greatin ,Land Rovers,


In my experience, Castrol's Syntrans (75W-85, GL4) works better in Land Rover R380 gearboxes than any combination of RL fluids I've tried, as does Torco RTF (which is getting too high a viscosity, but suits higher ambients).
I was pretty non-plussed with RL MT90 and MTL in the couple of applications I used it in, including Nissan Patrols, where I've gone back to Castrol Syntrax. (75W-90, GL-4/5)
Both these Castrol fluids are PAO/ester bases, made in Germany.

Syntrans is a brilliant fluid, designed around ZF/Mercedes and Volvo commercial/truck 'boxes in Europe.
Unfortunately Castrol is a pain as they re-name fluids in different markets, so what Syntrans is in the US, if at all.....

 

[gtx510]

I've been "researching" available GL-4's.
Do you guys know if these part numbers are correct?
Or know of another source for TAF-X?
Castrol...
SMX-S ------ 75W85 GL-4
Syntorq LT - 75W85 GL-4 - GM p/n 12346190, Dodge p/n 4874459
TAF-X ------ 75W90 GL-4 - Lotus p/n A082F6552S
Syntrax ---- 75W90 GL-4/5
Hypoy ------ 80W90 GL-4?

 

[Steve_RI]

I have Amsoil MTG in my 96 Corolla tranny. I have had it in now for 50,000 miles with good results - smooth shifting. I'll probably stick with the MTG on the next drain, but I have also had good results with Redline in my older Pathfinders.

 

[mjoekingz28]

I like it but it is almost too smooth. I guess these old transmissions aren't straignt into gear (like the Ferrari box), so you could feel your way to each gear but now you just guess and go.

 

[jbl]

My best experience so far is with a mix of Amsoil MTF and MTG.

I have used Castrol SMX-S, Redline MTL, MT90 and SF MTL-P.