What Race Oil do you trust?

[SSDiv6]

Originally Posted by e vassar

Have mostly used Mobil 1 and Lucas 10-30 in LT1 and LS cars We tried RP in the LT1 but would not keep the lifters pumped up. We have since went with solids (thanks nhra) 2 questions...do I need a additive with Mobil 1 or Lucas? since both cars have roller cams?...somebody mentioned Mobil 1 5-20 high mileage. Is this OK for all the time oil?
What about a safe heads up go fast oil?

After the engine has been broken in with a good break in oil, no need to put any additional additives in the oil, especially with a good brand racing synthetic oil.

There are many choices for a heads-up oil, but also consider the clearances you are running. Putting a thinner oil for a heads up run can also require overhauling the engine afterwards. Engine oils have a low surface tension and it operational temperature changes it. It is a risk you take.

Hydraulic lifters require a minimum of oil Centistokes to operate properly. The lower the oil viscosity, the lower the Centistokes. Centistokes is a measurement of the kinematic viscosity on engine oils, that defines the fluid friction and of the oil's film strength to support a load.

A 30w engine oil at 212 degrees F will have a Centistoke reading of 9.3 thru 12.5; however, 5w oil at the same temperature will have a 3 or less Centistokes.