I would expect even the 5W-20 synthetic that the new engines call for is well in line for lifter purging. One dealer I used to sub to had the lifter checker, one dusty tool I do not think they knew what it was for. I guess that is why they brought me in each time their mechanics stumbled. Heck in the 80s Mitsubishi had the pin in stock for purging the lifters, the part # is no longer serviced now.