I plan to change the fluids in my front and rear diff pretty soon, and I was planning on using Valvoline or Mobil 1 75w-90 for the front and Valvoline or Mobil 1 75w-140 in the rear. It’s a 2011 Outlander 500.

Advance Auto Parts: Search Results for 75w-90

The Mobil 1 75w-90 is $12.99 and the Valvoline is $11.49.

The Valvoline 75w-140 is $13.99 and Mobil 1 is $19.99.

My other question is there’s a Lucas Oil 75w-90 Marine Gear Oil for $14.99. Is that worth getting for the "marine" properties or is it just marketing…or not compatible altogether?