Best Oil and Coolant for CAT engines?

[smorgan87]

I personally like Delo synblend 15-40 (13$/g) and 10% 120-140ish wt gear oil, i think rawze uses walmart brand, i used to use Mystik (citgo) but have been buying my distributors xtreme brand synthetic for a cpl gear box replacements and just used the leftover in the engine. As far as the bypass, IMO you cant have too much filtration.