Red Line Lightweight Shockproof

[Bill_W]

Flyin’ Miata has this describes with equal parts of Red Line gear oil in one of their videos. Looking up Red Line’s info it describes it as higher than a 140 weight but lower than a 80w weight friction. Sounds too good. Anybody here use this?

https://www.redlineoil.com/lightweight-shockproof

 

[Rand]

its gimmicky has solid lube in it.
I Was never a fan of "smurfblood."
since the days of uncle scotty's cocktail

 

[Cujet]

Gimmick or not, I've used it in both street and road race application. No issues what so ever. Was it better than a quality synthetic? I can't say. Only that it looked like powdered zinc with some oil mixed in.

 

[Bill_W]

I just got an answer from Red Line. To sum up the response...

Red Line MT-90 75w90 is a GL-4 rated product for manual transmission and transaxles. Shockproof products are GL-5 rated with higher film protection and varying fluid friction flow characteristics.

In other words it has EP additives.

Also their response.
Not recommended for most synchro applications due to the product's extreme slipperiness.

 

[JavierH19]

Viscosity: 12 - 23.7 cSt @ 100°C; 58 - 157 cSt @40°C ?

 

[Overfill]

Is this stuff fine to mix with off-the shelf GL-5 fluids and use in a hypoid differential?

 

[Rand]

Is this stuff fine to mix with off-the shelf GL-5 fluids and use in a hypoid differential?

define .. "Fine"

 

[Overfill]

define .. "Fine"

Still GL-5. If you see something that falls outside your scope of "fine" would you say nothing?

 

[Cujet]

Is this stuff fine to mix with off-the shelf GL-5 fluids and use in a hypoid differential?

I would say no. It is a unique product that utilizes a massive additive package to achieve protection. A mix would seem to dilute the additives while increasing viscosity slightly.

 

[Rand]

Still GL-5.

yes, but possibly worse than either of the ingredients by itself.

You don't know what your secondary gear oil would do to the proprietary solid lubricant in shockproof.
dilute would be the best outcome.

To me since it would be an unknown gear oil with unknown properties
I'd go all shockproof or no shockproof.

Also it gets quite sludgy.

in very niche applications shockproof could be a plus.

 

[Rand]

I just got an answer from Red Line. To sum up the response...

Red Line MT-90 75w90 is a GL-4 rated product for manual transmission and transaxles. Shockproof products are GL-5 rated with higher film protection and varying fluid friction flow characteristics.

In other words it has EP additives.

Also their response.
Not recommended for most synchro applications due to the product's extreme slipperiness.

yes of course it has EP additives its a GL-5 Gear oil

Gl-5 = EP additives

shockproof also has a proprietary solid lubricant.

Even redline 75w90NS which is designed for manual transmissions is a GL-5 with EP additives.

Hypoid gears = requires gl-5