What gear oil is thinner Amsoil SAE 190 or 75w 90?

[95CHERJUST]

Trying to get the thinnest synthetic gear oil for my 4x4.

whats thinner amsoil SAE 190 AMSOIL - Severe Gear® Synthetic Off-Road and Drag Racing Gear Lubricant SAE 190 (SRN)

or amsoil Severe Gear 75W-90 AMSOIL - SEVERE GEAR® Synthetic Extreme Pressure (EP) Lubricant 75W-140 (SVO)

or should i use something else thats even thinner??

[janvos39]

Acoording to the viscosities given for these oils the 75W-90 is the thinnest oil.

[95CHERJUST]

i also found red line oil and they are 75w 80

thats the lightest gear oil out there any other ideas.

[needmpg]

Originally Posted by 95CHERJUST

i also found red line oil and they are 75w 80

thats the lightest gear oil out there any other ideas.

Look at Redline's super light shockproof oil. It's exactly what you're looking for, as it's half the viscosity of typical gear oils. 8cSt vs. 16cSt.

Red Line Synthetic Oil - Superlight ShockProof®

[bgd73]

Originally Posted by needmpg

Look at Redline's super light shockproof oil. It's exactly what you're looking for, as it's half the viscosity of typical gear oils. 8cSt vs. 16cSt.

Red Line Synthetic Oil - Superlight ShockProof®

I just went and checked that out..seems a bit too good to be true, but the cost is decent. I also have a prblem with wanting light gear oil. a one piece dual ranged AWD tranny behind a 90hp boxer. Diff built in

* Film thickness greater than an SAE 75W90, yet low fluid friction like ATF
* Used in low-power dog-ring racing transaxles with moderate to low load, qualifying, etc.
* Popular in British F3, Euro F3 and Star Mazda racing gearboxes for ultra low drag

I do need the so called friction additive for the diff.. I changed a sube trannies fluid just once without it. It does do something important. I wonder if it can be added to redline. Sorry to rob the thread and ignore everybody but myself. gimme gimme gimme