Hello Chris,
That is what works for you and many people who have a couple of cars and 1 or 2 other pieces. You are right, it may not be worth the $40/car savings. It is worth that to others. If you have 6 pieces of equipment that $240/year. How many people do you know who will drive 5 miles out of their way to save .02 /gallon on gasoline. If you noticed in all my postings on this string, I didn't talk bad about any oil, they all do what they are designed to do. Some are designed to do more than others. On your Nissan Titan, did you notice an increased fuel efficiency when you switched it to the higher grade oil? Most people typically will. Mine averaged 5% between my two cars when I switched them. As much as I drive, 5% fuel savings, extended drain interval, no filter change in between and reduced repair bills makes my oil pay for itself. My oil analysis kit is only $10.50, so it is a lot more savings to me than $40/car/year.