it's all marketing hogwash...
i have a 2008 evo 10 (well my boy drives it now but... anyways)
they specifically require you to buy and use Mobil 1 syntetic, and only Mobile 1. the engine bay has stickers etc. if you dont it will void the warranty. ok great. we been using that no problems for 6 years yet.
Mobil 1 is, according to the marketing sites, notoriously low in zinc. TERRIBLE for old cars. (funny i ran it for years on my '68 dart 340 and never had problems, ran it to 7k rpms many many many times)
now the real funny thing.... in '08 the 2.0 liter engines by mitsubishi were redesigned. it's an all aluminum block, etc. and guesssssss what. they did away with roller lifters that year. LOL
p.s. anyone who is a chemist will tell you that zinc is not a lubricant. it is more of a sacrificial metal, in that it will oxidize/corrode FIRST (more reactive) and thereby protects iron/steel from corrosion. it's a corrosion protectant.
