Originally Posted by markdunlap
I use and recommend BRAD PENN racing oil.
It's got enough ZDDP to suit me.
20-50 for drag racing.
Nitro 70 for blown alcohol pulling trucks.
This stuff is also so "clingy" its tough to clean off engine parts.
When do you use a straight weight oil such as 50 or 60? I don't understand what the diff is from a 50wt -VS- a 20/50 for example. I see you use it in the alcohol motor...