90wt gear oil substitute?

[vagabond]

With all the improvements on oil, what could be acceptable to use rather than 90 in my '75?

 

[Cruiserdrew]

Use 80w-90 GL5. It's available everywhere.

 

[Poser]

With all the improvements on oil, what could be acceptable to use rather than 90 in my '75?

Welcome.




What are you trying to gain by not running 80W-90 gear oil in your old truck?

 

[camcruiser13]

Welcome.




What are you trying to gain by not running 80W-90 gear oil in your old truck?

more horsepower!!!!!

 

[Cruiserdrew]

I would try some things that look like gear oil and see how far you get, and what you learn. Some suggestions:

Karo syrup
Used motor oil
Maple syrup (winter only)

 

[FoYoChe]

we use a 75-90W mobil synthetic gear oil in some expensive gearboxes here, and it seems to drop oil temperature about 30 degrees, makes the gearboxes survive instead of dying once a year. problem is it's $8 a bottle. but you might find a better price on it somewhere

 

[Morse_FJ40]

I run Amsoil 75-90 synthetic, and love it!!!

 

[vagabond]

90wt

thank you all for your input.
Glad to hear of your recommendations!

 

[andrewfarmer]

use Redline shockproof- choose the viscosity to suit your driving style - this stuff also works well with water in it - for some reason it doesnt break down the way std oils do.

 

[Advent]

I get Mobil Synthetic Gear Lube in the $5 bucket. $99.

Mobil 1 is more expensive. Supposedly it's the same stuff plus some limited slip additives. Since I don't have a limited slip, I don't use it.

 

[n2666s]

royal purple, great stuff but pricey

Lou