I used to be that way then I saw the UOA on my wife's Impreza crosstrek showing better wear and insol results and usable remaining TBN than the unit average at a much breifer 6K miles. That was with the Top shelf Valvoline Advanced Synthetic and a high mileage driving regimen in temperate climate that would allow an extended OCI. I'm sending off an 8200mil UOA sample with the less costly Magnetec 5W20 and we will see how that stuff compares soon ... If we get results before Christmas/Chanukah from Blackstone. I'm VERY curious.
Originally Posted by aquariuscsm
This story is why I'll never understand the extended oci crowd. Some people have good luck with the long intervals, or is it just luck after all? Oil is so cheap,keeping it changed and clean is more important than the brand imo.