yes, i have had a failure. it was a 396 motor in my dads car with a fresh rebuild. cam ate a lobe after 2 years. flat tappet cams need the ZDDP additive.
all the newer oils are designed for engines with roller cams. not our old designs and flat tappets. i have switched to shell rotella, but now even it has had 1/2 of it's good stuff removed. i now add a little GM EOS to the oil at each change. even EOS is is discontinued by GM for EPA reasons.
there are now begining to be a few oils being released for older engine designs.
by the way that was a interesting read, but way off! tom
