There is a very ineresting thread on the my350z.com forum put together by RESOLUTE.
Guys over the pond have been collating oil analysis of their used oils to determine how well they perform, and which is better under what conditions for standard or modded engines
No hearsay or brand snobbery....just the facts.
READ AT YOUR PERIL, AS IT WILL TAKE YOU WEEKS TO GO THROUGH IT ALL
http://my350z.com/forum/engine-and-driv ... -info.html