Quote Originally Posted by Dave Severson
The rings will seat with synthetic oil, just may take a bit longer. Depends on the hone of the cylinders and the type of ring used. I've ran synthetic on a number of race engines with narrowed low tension rings and had no problem getting them to seat. On a GM crate motor though, dinosaur oil will speed the ring seating process along.
dpes the ring compisition have anything to do with it also? like cast, Molybedum, Chrome Moly?