GL-1 Oils, Can not find

[M35A2-AZ]

Well I know there has been many threads on what oil for the Trans and T-case and I have read them all, but I am lost as to what to use.
The problem is I cannot find any GL-1 gear oil. I talked to Napa and they cannot get the Valvoline that I was told was a good GL-1 oil http://www.napaonline.com/Search/Detail.aspx?R=VAR70044_0006411620

They do have their Napa GL-1, but they do not know if it is Yellow metal safe. http://www.napaonline.com/Search/Det...205_0006545685

We do not have a Tractor Supplies here in AZ.

Any help on what I should use. There are a lot of oils out there that are GL-5/MT1 is that Yellow Metal safe?

Thanks for any inputs.

 

[doghead]

Get the NAPA oil you linked. It's fine.

 

[Coal Cracker]

The NAPA oil is fine,

 

[Westech]

well if you REALLY REALLY want GL-1 :
http://www.builderdepot.com/browse.ihtml?pid=872276&step=5&prodstoreid=10321
But most run a GL-5 with a MIL-1 rating (yellow safe) really 99.999999999% of lubes are yellow safe. You can run a 50W full synthetic oil also.

 

[paulfarber]

The dirty little secret is that THERE ARE NO API GL-1 LUBES ANYMORE.

GL-1 has been superseded, so API does not test not certify them as GL-1 compliant.

The VENDOR is saying it meets GL-1 specs, which don't exist (aka superseded), or oddly, the testing devices do not exist!

"API Categories GL-1, GL-2, GL-3 and GL-6 were declared inactive by SAE Technical Committee 3 in 1995, even though oils may be marketed with these designations. Similarly, ASTM does not plan to maintain the performance tests associated with these categories, as in a number of cases these tests can no longer be run because parts or test installations are not available."

Run GL-5/MT-1

No one's trucks are blowing up because they are using GL-5/MT-1 oils.

 

[M35A2-AZ]

Thanks guys for all the replies.
Think I will go with GL-5/MT1

 

[Tinwoodsman]

You can order it from NAPA in one or two gallon containers.

 

[wsucougarx]

I buy my NAPA GL-1 in 5 gallon buckets for $35 locally.

 

[paulfarber]

I buy my NAPA GL-1 in 5 gallon buckets for $35 locally.

Not to be a smart azz, but there since 1995 there have been no certified (by a recognized standards body) GL-1 oil.

I could fill a 5 gal pail with cow pee and call it GL-1 oil as there is no standard for it anymore. You are relying on the manufacturer to test and blend it appropriately, using whatever standard they may or may not use.

GL-5/MT-1 is not going to rot your innards.... if anyone has a failure caused solely by GL-5/MT-1 oil then they are keeping it a secret.

 

[Floridianson]

What is this from NAPA.

 

[SCSG-G4]

The can says it's an API MT-1 oil, nothing about GL-1. As said before, if it's tested it's GL-5.

 

[Jimma]

My local napa sells thier brand of GL-1 for about $10.00 a gallon or $48.99 per 5 gallon bucket.

 

[4x4 Forever]

Purchased a 5 gal pail of GL1-90 oil from my local fuel distributor, cost: $39.50. Pumpelly Oil in Sulphur, LA