[Formulajones]

As far as oil goes, 20-50 has worked perfectly fine for me for decades with flat tappets and roller lifters, regardless of who's name is on it or whether it has a wheel on the bottom or not. But I use a synthetic that has a way better pour rating than most other 20-50's on the market and as good as many 10-30's so the blanket statement these cam manufactures make of using certain viscosity oils for certain lifters really should be explained a little better to the public because there are too many variables with oils.