O.K. I'm asking Jim
I'm curious as to why you're using the Pennzoil? I having nothing against this oil brand, and as a matter of fact I use it in all four on my gasoline engine vehicles. I don't have a bad thing to say about it's use in these engines. I've got 175,000 on one 165,000 on another and 102,00 on the third and the truck is just a baby with only 54,000 Never did have any problems with useage or internal engine problems. I saw it sitting on the shelf when I went in to buy Rotella for my newly acquired MB diesel and just about bought it instead. Actually, on the next go around I just might if you have something good to report that sheds some light on their multigrade oil compared to Rotella. Please tell me your story.