Andrew Markel discusses oil specifications on European vehicles, and how international committees often work together to improve oil standards. Sponsored by Auto Value and Bumper to Bumper.
As engine technology has evolved and fuel efficiency standards have tightened, oil specs have increased in importance. Using the wrong viscosity could set a fault code in some applications or interfere with the normal operation of the variable valve timing system. VVT engines not only require a specific oil viscosity, but also require an oil that keeps the pulse-modulated variable valve timing solenoids clean, lubricated and free of small air bubbles.