Mystik or Pennzoil GL-5???

Messages
1,081
Location
oklahoma
I want to run a dino gear oil and can get both of these for a decent price...which is better & why? My rear diff is limited-slip and I am assuming both of these are formulated accordingly? My front diff is open so it won't matter...
 
Messages
110
Location
Georgia
I've used Mystik Gear oil for many years in big truck rear-ends and trans. Never had a problem with it. However, I've slowly got away from the Mystik Gear oils because I don't think the quality is still there like it was when it was owned by Cato Oil. I still use the JT-6 Hi-Temp Grease but not the gear oil. I would go with the Pennzoil.
 
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