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Tractor supply 80/90 gear oil?

W

Wes Verbal

Member
Been doing a little research on oils and as of right now I have found that the TSC gear oil 80/90 weight is GL-5 it dosent say anything on the jugs but on there website says Gl-1 which (I Think) means yellow metal safe? Correct me if I am wring on this? Anyone knw if this stuff is safe to use? Considering most antique equipment requires Gl 3 or 4 oils ? Is the TSC safe to use or no?
 
of course they are safe. why would a major chain store sell unsafe oil? what you need to do is find the right application (oil) for your machine. read the container label/printing. that will tell you what you need to know.

btw: I use TSC oils in my Fergusons.
 
What is unsafe is they will have a sign by the containers listing the price and when you get to the checkout will often be a different price. Have to watch them closely.
 
I don't buy farm store oil. I go to a fuel supplier like Mobil, Phillips, Shell or other major brand to get my oil. On the back side they are getting harder to find.
 
I get my 80W-90 gear oil at Hirsch Farm & Feed. Says GL-4 right on the jug (1 gal) or pail (35# which is about 5 gal). A TSC store just opened but it's about 20 miles away - haven't checked their gear oil yet. They did have a sale on hydraulic oil for $26 (5 gallons) - pretty good deal.
 

I have never heard of any domestic vehicle that was effected by 80/90 gear oil. Foreign yes but only one make but not domestic...

I have been using 80/90 as a replacement for 90W for about 30 years across the board in everything except on Triumph euro junk so far so good.
 
I buy only OEM oils both line and hydraulic. Not that more than Coop oils. Only use TSC oil in the junkers.
 
Some gear oils contain sulfur which is not good for yellow metal in some older transmissions. So you have to do some research on the oils you use 2cyl JD with their strait cut gears can benefit from gear oil designed for it.
 
Hey, Morgan I just got back from TSC today,I drain out that 80/90 oil in my MM and put in the gl-1 90wt ford oil..... seems little more like the old stuff instead of the new 80/90 there 80/90 says gl-5 but online says MT-1 which i have heard is Yellow metal safe etc?
 
My brother is a member of a Ford Model A (and AA) club. The trucks of that vintage used a worm gear rear axle. The pinion is steel, and the mating ring gear is brass. The GL 5 oils have made swiss cheese out of the brass gear. He did some careful research with the major oil companies and found that many of their tech people have no idea about the destruction done to brass by the sulfur containing GL 5. I suspect the sulfur combines with the water of condensation and becomes sulfuric acid. That is what destroys the brass. He has posted his research findings and pictures on the national Model A collectors website.

Paul in MN
 
To be safe, I'd stay away from GL-5, that's not to say all GL-5 is bad, especially synthetics. Most regular GL-5's have high levels of moly-d and sulfur compounds which is the corrosive stuff. Maybe if the GL-5 specifically states it is safe for yellow metal ( copper/brass). True GL-4 or lower to GL-1, should be safe.
 
Yes, Ive heard GL-5 is terrible stuff. But
Ive also heard most GL-5 oils now days are
(yellow metal safe ) true not ive got no
idea? /: I did buy some Gl-5 80/90 few
weeks back and run it in my MM Z model? It
didnt say on there jugs MT-1 but does say
Mt-1 online on the TSC website? I know
Travellers oils are made by Warren
distribution co. I ended up buying some
90wt straight mineral gear oil thats a
Travellers brand says made for ford tractor
1938 to 1952 I thibk supposed be like old
stuff back in the day? Has rating of Gl-1
anyways i noticed when I did flush my rear
tranny there was somewhat of little shinny
particales in the oil pan??? Look be brass
kinda ....... normal I guess for 70 year
old tractor. But ive read where they say in
order for the Gl-5 to start its corrosive
properties you have to get the oil at a hot
temp in order for the sulfur to start the
corrosive side?
 
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