Hello, I'm wondering how good is the Mopar 75 W90syn and 75W 140syn gear lubes and is the valvoline 75 w 140 syn any good also, because thats the only one avialible around here.I'm leaning towards the Mopar stuff cause i can get it competively priced to the OTC oils.
Mopar gear oil
- Thread starter Ram@Will
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Many of the 75w-140, synthetic gear lubes are made from cheaper, group III basestocks. I'd make sure the stuff you buy is PAO based, as it will hold up better - particularly in resistance to oxidation - and provide better fuel efficiency.
The PAO based gear lubricants are still dominant in commercial/industrial applications due to these advantages.....
The Mobil 1, Redline, Royal Purple and Amsoil gear lubes are all very good....I'd just order one of these since you don't have to change the stuff very often. The Mobil 1 gear lube is available from one of our site sponsors: www.AVLube.com.
TS
The PAO based gear lubricants are still dominant in commercial/industrial applications due to these advantages.....
The Mobil 1, Redline, Royal Purple and Amsoil gear lubes are all very good....I'd just order one of these since you don't have to change the stuff very often. The Mobil 1 gear lube is available from one of our site sponsors: www.AVLube.com.
TS
I've used the Mopar 75w-140 in a few trucks and it seems to be pretty good....can't tell you about the lighter grade,never used it...I am in the same boat as you can get Mopar fluid for a good price.If you can go by smell...which isn't very scientific...Pennzoil full synthetic 75w-140 and the Mopar both do not have a sulfur smell to them..to me this indicates full synthetic
The Mopar fluid in both axles on my Dodge was thick and black at 15k miles, while the Mobil 1 was like a darker olive oil at the next 15k miles. I would have changed the Mopar fluid earlier, at least at 5k miles, if I had known that it would have looked so bad. I seem to recall someone saying that AAM said that Texaco supplied the factory fill. I'll stick with Mobil 1 for now as it seems to be working well.
According to someone from a company which makes lubricant additives, the OEM will change suppliers for a difference of 35 cents a gallon.
So, it is very possible that some of the other brand gear lubes may be a bit better.
So, it is very possible that some of the other brand gear lubes may be a bit better.
MolaKule
Staff member
Specialty Formulations also offer full synthetic GL5 gear lubes in both the 75W90 and 75W140.
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