Lucas Oil10131 Pure Synthetic Oil Stabilizer - 1 Gallon (4 Pack)

Works well in cold, compared to the non-synthetic. I pumped a bunch in my rearend. LOL.

This thing is really good ,it does not break dawn that easy.

Product is great and deserves 5 stars. But the shipping was the slowest ive seen in the industry. It literally sat for 6 days.

I use this in all my cars. Engines, transmissions, and gear boxes.