Direct from Harvey at Brison, he states the new lite weight pistons and cylinders and the fact the pistons only have one ring make it so. He says he has taken hundreths of motors apart and seen the affects of to much oil and poor quality oil. He recommends as stated previous use sythetics from the get go.And yes the metals are different today than they were 15 0r 20 years ago. Much stonger and durable.