I've blown 2 new flat tappet engines recently ('68-Z28), and have found a lot of information on the EPA's new ZDDP levels, oil companies misleading labels, and the CAM manufacturers move to Mexico a few years ago.
After all the research, I ordered some ZDDPlus (last week) and plan to change my oil (with ZDDPlus), this weekend.
I was planning on sending in 4 samples to have be tested, but now I'm hearing those labs are a scam??
I've tried several searches on this site and was surprised to find only one thread on the subject of ZDDPlus.
I would love to hear from BITOG or other opinions on the ZDDPlus product.