Richard Moore uses Lucas Heavy Duty Oil Stabilizer for Truck
This stuff works great. I have a truck with a Cummins C Series engine with 637,000 miles on it. I started using Lucas Oil Stabilizer about 50,000 miles ago and my mileage is up, the engine runs quieter and I use no oil between changes. I change the oil every 10,000 miles and used to use about a gallon between changes. Now I use none.