yep, dominator at 50:1 here also.. i hva never had an engine blow up or seize yet.. been using it for a long time.. the only top end i had wear out lasted 6 years, and still started and ran good.. was just gettin low on psi.. the cylinders didn't have a scratch or scar at all.. just normal wear from years of abuse.. i was very impressed.. but like fouledout said, its all preference, this topic usually opens a can of worms so i'll shut up now..