How big of an upgrade is premium conventional oil versus dealer or quick lube bulk oil?
I've heard the stories about quick lube places using inferior bulk oil that does not meet proper spec or additives, but is this really common practice?
Finally can I extend my OCIs if I use premium conventional from shaken jugs and with foil under the cap instead of dealer or quick-lube bulk?
I've heard the stories about quick lube places using inferior bulk oil that does not meet proper spec or additives, but is this really common practice?
Finally can I extend my OCIs if I use premium conventional from shaken jugs and with foil under the cap instead of dealer or quick-lube bulk?