yeah im running cool power full synthetic 15% (plane fuel) for a gallon for only $15 and i like it better than the others.
of course with my a.d.d i put a half bottle of midas touch in the brew not the usual 8 drops, it drops the temp by about 25 deg, it bogs a little when its cool (higher vicosity), but when its about 120deg it rips the road a new one