Project Farm just did a video on comparisons of different additives to help lower coolant temps. Although he didn't test the additive, he did test the coolant with Water Wetter. I know I've been using Water Wetter in my snowmobile for years and it does help with heat transfer. If you tow or have trouble with overheating, this is definitely something to look into. I should add some to my Sierra since I tow a lot.
) without even pulling any trailers. So I plan on picking up some Water Wetter. For instance at a comfortable 50 degree day it will run 230 degrees if traveling less than 30 mph. When I purchased this truck three years ago I didn't look close enough to notice the fans were not powered by the engine. I won't make this mistake again.