ORIGINAL: soarrich
Any of the oils work, I use Pennzoil aircooled at 32:1 for everything. The only reason to go to 40:1 or 50:1 is it keeps the plane cleaner. Some guys think they get more power at 50:1, but you get the most power at 16~20:1. A well oiled engine will last longer too.
The key words here are...
A well oiled engine will last longer too! Capt,n