Quote:

ZDDP is outlawed in Canada and Europe. I have heard that it is on the chopping block for the US too. I like the fact that this is a product that is environmentally good to use.



You sure about this? We build trucks in the States that ship all over the world, in Ste. Therese Ontario, and in the Netherlands (DAF) that use Chevron Delo 15w40LE CJ-4 that still very much has ZDDP in it. ZDDP is still in the oils (we all know that) just at reduced levels.
Are you saying Canada has banned it as a do-it-yourself additive? Can you buy STP in Canada? That still has it and its an additive....