The following is a compilation of 2 weeks of data gathered from a Caterpillar tractor equipped with a Diesel Magnum Propane Injection System near King City, California. THe system has been installed and run on this tractor for a little over 1 year. At 2,000+ hours, this single tractor pays the farm considerably more than $20,000 every year in fuel cost savings using the DM Injection System.