I drive a 1998 Peterbilt 379. It has the CAT 475 and a 10 speed and I pull a flatbed. Most of the time I’m loaded pretty close to 80,000 pounds. I got my truck when it had 500,000 miles on it and I started using the No-Mor Friction metal treatment product when it had about 650,000 miles on it. It’s been noticeably smoother. One of the biggest differences was the power steering was starting to act up and develop kind of a funny hitch when you turn the wheel to one side to the other. It hasn’t done that since I added the No-Mor Friction. I’ve got No-Mor Friction in my gearboxes and my front hubs. One other thing I noticed is that I’m getting about 4-5% better fuel economy which doesn’t sound like much but when you’re getting about 6 miles per gallon it’s quite a bit. Over the course of a year you’re probably looking at $2500-$3000 that you’re not spending on fuel. Now my motor has 870,000 miles on it and it runs just fine. I haven’t had to replace any parts are a part of the crankcase oil system. That also includes the water pump and the air compressor, which is pretty unusual for a motor of this type. So I feel like the No-Mor Friction has been doing a good job and I would definitely recommend it to anyone else. Thank you.