75W90 Gear Lube/Fluid

[Seraphitia102]

I went to EZ Lube and I did get a gear lube change. However, I looked under the car myself and I saw something imprinted that says "use 75W90 Synthetic Gear Oil Only" or something of that matter. I wasn't sure if what EZ Lube put in was 75W90 synthetic, but I went to Autobacs recently and saw that all their 75W90 gear lube are all synthetic.

My question would be does 75W90 gear lube only come in synthetic? Or is there such thing as conventional 75W90 gear lube? I'm only asking this because in the store I went to, I saw nothing of conventional 75W90 fluid.

 

[Kilgore Trout]

There are two choices:
80-90 dino
75W-150 synth

You should use what is on the tag which is 75W-140 synth.

What did EZ Lube use?

 

[Seraphitia102]

I guess I got my numbers wrong, I went to EZ Lube in Torrance. It says on my receipt, 75W something, so I was wondering if it was synthetic. Thanks for your help

 

[Kilgore Trout]

Yes, it sounds like they used what the tag says to

 

[gfong]

Here some more grades of gear oil. You were reading correctly.
75W90
75W140
80W90
85W140
90

A lot of newer stangs switch to 75w90 but came from the factory with 75w140. I switched over to Royal Purple 75w140. You can use what brand you like.