Much obliged. I'll check it as soon as I can. It was about a quart low after about 1000 miles of driving. I know that's within spec to Isuzu, but not for me. I'll be replacing the PCV and EGR soon. Which part of the EGR tube should be replaced? I know there are two parts. I just don't know which one clogs. I've got my fingers crossed that this will eliminate the oil burning for a while.