According to the Isuzu Dealer that drove my VX through the shop door, it is definitely a common problem with our motor. I am about a quart low EVERY oil change. Of course they try and talk you into a PCV Valve Flush everytime, my rule of thumb is every 15,000, or 3 changes I'll get the flush.

Apparently Isuzu feels it's 'Normal' to lose up to 3 quarts per 3,000 miles before they deem the motor to have a problem! Can you believe that! Once you get talking to these mechanics, you can find out some real bogus sh*t! ;eekg;