Review on Hy-Per Lube By Rislone ZDDP Supplement (4405-6PK) by Meechie Camlin

I use this stuff with every oil change in my 89 bmw 325i daily driver with the m20b25 strait 6. These engines seem to make lots of noise in the top end due to their old school flat tappet design (sounds kinda like a typewriter). Wow does this additive quiet the noise down! Night and day difference.Edit: I still buy this stuff. They changed the bottle (used to be yellow) but still great product. Added half a bottle to a work van w/ 250k and lifter tick went away!