I put Mobil 1 in every thing I have and I love it. I put it in my truck at about 3500 miles and had no trouble and have been seeing around 1 mpg better. Who know that could be the truck loosing up a little or it could have been the oil. The main thing you have to watch it what weight oil you put in to your rig. Just remember the manufacture knows a little more about your engine than what you do so do what they say to do and you will not have any problems..