Difference is it doesn't meet the spec for the 6mt. Neither of them do. Amsoils new

 

What specs are you talking about? Be more specific.

 

DIRECTIONS FOR USE

Red Line MTL may be used in transmissions which recommend 75W, 80W, or 85W GL-4 gear oils, or SAE 30 or 5W/10W30 motor oils. If a 90W GL-4 or SAE 40, 10W40, or 15W40 is required, MT-90 may be used. If the transmission or transaxle requires an SAE 90 GL-5 gear oil, then Red Line 75W90NS or 75W140NS Gear Oil may be used. In transmissions which recommend Dexron or Mercon fluids we recommend our D4 ATF which is very similar to the MTL, being a GL-4 Gear Oil also. The D4 ATF will provide better low-temperature shiftability, and the MTL would provide better wear protection for racing use. MTL is not designed for use in rear-wheel drive differentials. Those generally require a GL-5 lubricant such as Red Line 75W90 Gear Oil. It is not necessary to flush the transmission before replacing with MTL. Remove the drain plug and drain while warm. Seal compatibility has been designed to be similar to petroleum lubricants, and leakage should be no greater than any other oil of comparable viscosity. Being formulated with extremely stable synthetic basestocks, MTL and MT-90 will last much longer than conventional petroleum lubricants. However, we do not recommend extended drain intervals, since without a filtration system, there is no way to remove metal shavings other than draining the lubricant. The regular maintenance intervals are also recommended to insure that the proper level of the fluid is maintained.

Trans:
Blend of
MTL (2 quarts) + MT-90 (2 quarts)


You have to mix it because Nissan specifies something like 75w85 gear oil and noone else sells that weight oil. But Amsoil recommends this above for the 6mt in the G35. Works just fine. I used another gear lube by amsoil (green color) and my 6mt on my 04 hated it,.

 

Why did you post the directions? OK, you said MT90 doesn't meet some "specs" which you still haven't clarified. You recommended some Amsoil 75W90 tranny fluid. Isn't MT90 75W90 also?

 

www.my350z.com to see why. I just know for a fact many have had issues with Redline.

 

for the tranny:

for the diff:


I simply wouldn't settle for anything less.

 

Service manual calls for 80w-90, which amsoil makes. Why did you go with the 75w?

 

If you look at the spec sheet you'll see:

"AMSOIL LONG LIFE SYNTHETIC GEAR LUBE 75W-90 replaces competitors' 75W-90 and 80W-90 viscosity grades."

Also, it is speced as such in Amsoil's product application guide. It is also their best gear lube. Why settle for less? That's like saying just because your manual recommended you to use a 30 weight oil, you wouldn't use a 0w30 (which isn't listed anywhere in there to the best of my knowledge but outperforms bother the 10w30 and the 5w30.

 

Motul Fluids !!!

 

What model G35 do you have and have you needed to use the slip-lock additive?

 

I have an '05 6mt sedan and I haven't had to use any additional addivites other than the ones that came with the amsoil gear lubes.

 

Cool, thanks! Looks like I got a weekend project ahead of me.

 

isnt it true that if you service your transmission somewhere else other than the infiniti dealer it VOIDS it??? i am very skeptical about taking the G somewhere else to do anything (except oil change) because i like knowing that its getting worked on by someone that sees infinitis day in and day out...

 

.......then take your own oil with you and get an Infiniti/Nissan dealer to do your change.
I have a friend who uses LUCAS gear lube now and swears by it. Says it's better than anything else he's used.
C.

 

changing the oil in your transmission is actually easier than changing engine oil... so you'd void your engine warranty if you changed your oil anywhere other than Infiniti.

Note, however, that you should keep records of all of your services. Such strict record keeping is what Infiniti will look for if you have your car serviced elsewhere. For example, I (and only I) service my G. Why should I pay someone else to do a half-assed job?