Mar 24, 2014. Tony (New York) drove a big diesel motor home to the Keys in Florida and back. He had treated the diesel engine, transmission, differential and power steering with BestLine Lubricant. Most of the time, he drove at 80 miles per hour, which is fast for a big diesel rig. The savings on fuel even at that speed were huge along with a major drop in temperature in both the transmission and differential. He observed his fuel consumption which he believed was an 11% improvement over previous trips. He was excited just how smooth the engine started and ran. Tony also removed the grease from the CV joints on each wheel of his Subaru Outback. He treated them just with the MLT 101 penetrant and drove over 90 mile per hour with everything quiet and smooth. It has been over a month running the vehicle without any grease in the CV joints and according to Tony
It run just fine.