Mobil 1 75W-90 instead of Fords Motorcraft 80W/90.

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I intend to change out the rear axle oil on my daughters 2008 Ford Escape by using Mobil 75W-90 instead of Fords Motorcraft 80W/90. Is this a safe/wise move? both meet GL-5 specs.
 
Originally Posted By: JoeJ
I intend to change out the rear axle oil on my daughters 2008 Ford Escape by using Mobil 75W-90 instead of Fords Motorcraft 80W/90. Is this a safe/wise move? both meet GL-5 specs.



Mine calls for the same stuff , I used some wallmart super tech 80w90 I also put on a shinny new cover
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OMG IT WILL BLOW UP! FORD CAN SENSE WHEN NON MOTORCRAFT PRODUCTS ARE BEING USED. THEY WILL SEND SOMEONE TO YOUR HOUSE AND PEE IN YOUR GAS TANK.
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Originally Posted By: JoeJ
Just my luck to screw up my 16 year olds 1st truck. I just want to make sure.

You're fine. Some people might go overboard with the sarcasm, but don't let that get to ya.
Go ahead and use the Mobil.
 
I wouldn't consider replacing MC 80W90 GL5 of KV@40*C of 146 cSt with a M 1 75W90 of lower KV@40*C 115 cSt, not that the axle would blowup.

Edit:delete '132 cSt'
 
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Another confirmation for the Mobil 1 - 75W90 LS.
I have used it in many vehicles from my Firebird FORMULA Rear Differential to a Lexus AWD Transfer Case and Differential. All with great success.
 
Funny you should mention this.

MC gear oil (and Mercon V for that matter) is surprising hard to come by. Considering that you can get Motorcraft Oil almost anywhere I thought I was just going to walk into Wal-Mart and leave with MC gear oil and Mercon V and boy was I in for a surprise.

I’m sure the M1 will be fine.
 
I had this exact same question. So I emailed Mobil. They said no. "No". They didn't give any explanation, just said no. I would guess that a lot of times you could get away with it in a lot of applications. But Mobil said no and so I won't do it. Since they said no, I assume it won't be better, and it could be worse.
 
Originally Posted By: rollinpete
Originally Posted By: JoeJ
I intend to change out the rear axle oil on my daughters 2008 Ford Escape by using Mobil 75W-90 instead of Fords Motorcraft 80W/90. Is this a safe/wise move? both meet GL-5 specs.



Mine calls for the same stuff , I used some wallmart super tech 80w90 I also put on a shinny new cover
banana2.gif






The Shiny Cover is a must for this change to be successful! You can increase the lube compatibility if you add an aspirin and paint the cover fluorescent Orange.
 
Originally Posted By: NibbanaBanana
I had this exact same question. So I emailed Mobil. They said no. "No". They didn't give any explanation, just said no. I would guess that a lot of times you could get away with it in a lot of applications. But Mobil said no and so I won't do it. Since they said no, I assume it won't be better, and it could be worse.


Sound like you caught someone on one of their bad days. They didnt give a reason because there isnt one. Both are GL-5 lubes 90 grade. The Mobil just has better cold temperature performance with the 75W rating instead of 80W.
 
Originally Posted By: NibbanaBanana
I had this exact same question. So I emailed Mobil. They said no. "No". They didn't give any explanation, just said no. I would guess that a lot of times you could get away with it in a lot of applications. But Mobil said no and so I won't do it. Since they said no, I assume it won't be better, and it could be worse.
+1
You nailed it.

Originally Posted By: Colt45ws
Sound like you caught someone on one of their bad days. They didnt give a reason because there isnt one. Both are GL-5 lubes 90 grade. The Mobil just has better cold temperature performance with the 75W rating instead of 80W.
It's about KV @40*C.
It's not about mood.
 
More likely, M1 reps aren't going to state something in contrast to the recommendation of the mfg.

Quote:

It's about KV @40*C.


Can you explain the 'about' part?
 
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