oops... You are Correct AGAIN, they are using 20w-50...
I was discussing oils with someone else when I replied... It pays to check what you type, before posting...
I still would use Mobil1 15w-50 Synthetic... just because it is readily available. And the folks at Hydro Gear are now recommending synthetic (plus have told me 15w50 Mobil1 is great in their components)... :smile:KennyV