Brian,

How much castor are you talking about?

I run Cool Power 15% in everything, and add one ounce per gallon, mainly for bearing protection; along with a bit of that lubricity additive that Boca sells. Dunno how good that is, but it can't hurt.

Ya think one ounce per gallon is enough? My 1.60 came in yesterday; this is a BIG sucker. Don't know what I was expecting, but this will definitely be the largest model engine I've fooled with yet.

Of course, the plane for it was truly trashed by United Parcel Smashers. Going to call here in a minute to see what Chief Aircraft will do about it...