Has anybody tried the Lucas 75W-90 rear diff fluid? I need to change mine ahead of a decent sized road trip I'm doing on Friday and this seems to be the highest quality available locally. Other than this it's just Valvoline and Mobil 1 and I've never been impressed with anything from either of them so don't want to bother unless someone says it's worth the effort.
https://lucasoil.com/products/gear-o...hetic-gear-oil