I've been looking for a -45C extreme low temperature GL5+ or GL6 75w-90 replacement gear oil for an 07 Nissan Pathfinder which doesn't have limited slip differentials, so can use a low friction oil. The PF front diff is the hypoid type so needs the GL5+, the rear requires a GL5. About the best gear lube that I've found so far that seems to fit the application is Esso Gear Oil GX Extra but wanted to see suggestions for other gear oils or comments on the Esso product. Thanks.

Amsoil Severe Gear 75w-90.


http://www.amsoil.com/storefront/default.aspx?zo=1452557

quote:

Originally posted by prtdvl:
Amsoil Severe Gear 75w-90.

Thanks Prtdvl, Amsoil is probably a fairly good product for the price, but the SVG 75w-90 gear oil is for LSD's and I was looking for an oil with a lower 40C viscosity and not for limited slip. As the Esso GX Extra is only available in 20 liter containers, Motul Gear 300 liters is the way I went, with an added benefit of -55C at the low end. I had to go to a Toyota dealership to get the oil though, as that is the only product they are recommending locally to take care of the cold factor here and for improving fuel efficiency. I'm thinking that you Amsoil fellows are kind of out of the loop in this area.

This message has been edited. Last edited by: Greybrick,

Severe Gear is not "intended" for LSDs, it is COMPATIBLE in those applications, and it has a pour point of negative 60 farenheit, negative 51 Celsius.


https://www.amsoil.com/storefront/svg.aspx

Curious, where are you that you need a gear oil for operation in temps in the -45C/-49F range?

Thanks Michael,

scroll down to the climate section in this synopsis of the Fort McMurray, Alberta area. Three to four hours north of Fort Mac I've seen -50C night temps for extended periods in different years and these irrespective of wind chill losses,...full blown Arctic environment complete with safety orientations before you leave the confines of the shelters. As projects run 24/7 there is always a concern of how best to conserve equipment, but this is not the only area where we get to work and play in the snow and cold to keep the pumps on at US fuel stations, and our own in Canada. ;-)

An interesting aspect to working in the far north in sub -50C conditions is that when you bring a unit out of the area it is virtually rust-proof and nothing except leather upholstery ever seems to wear out, similar to cryogenic metal/nylon/plastic cryo treatments provided by various companies.

This message has been edited. Last edited by: Greybrick,