Rodd
Recruit
If you are not in freezing temps you dont have to add any antifreeze with water wetter, but I think it or hyper lube suggests 20% antifreeze for street vehicles, probably for those that might forget they arent set up for freezing temps. I only left in what was in the water that was left in the block
Just don't forget you have 90% water in it and decide to head to the Sierra's for some skiing or boarding. Then you could be in real trouble.