Stocking 2 types of oil and doing oil analysis once a month on every truck is far from cost effective, although as you say, it does nickel and dime the company. What John Deere drives 100,000 miles a year? Tractors are typically run at one of several throttle positions, typical on or off. At a constant load and RPM you may be able to prove 2.x percent in fuel economy improvement from oil. In the trucking industry, variations in load weight, weather conditions, and mostly driver habits will wipe out any 2.x percent economy increase. The loads are so high in a HD diesel that oil viscosity makes very little difference in fuel economy.
I certainly understand that oil viscosity does have an impact on fuel usage, however on anything that has a some displacement and HP, it is negligible at best. No matter how well an oil may or may not perform in a 2 stroke Detroit is moot, they are pre-WWII history and are quickly becoming conversation pieces and museum relicts. The performance of a synthetic oil in a 2 stroke is even more irrelevant since almost no one in the trucking industry has money to flush down the drain in such ways for long. Detroit currently only sells two engines that were designed by them, the 50 and 60 Series, and the 60 was jointly developed with Perkins and John Deere. The trucking industry runs mostly Cats and Cummins engines these days, all four strokes. Tire pressure has more of an effect on fuel economy than oil viscosity. With excellent dino oils made up of mostly gpII+ and gpIII base oils, that have good cold weather properties and even better wear additive packages, most companies would opt for the dino oil. The only companies that use synthetic oil widely are ones that operate in cold climates almost exclusively. From my training, research and experience in the heavy duty diesel industries I just cannot see a valid bases for most of your arguments androbot2084. I know very little really, that is why I continue to research and BITOG is one place for good information in most cases, more reading may be in order. This is probably just getting plain ridiculous now....
I certainly understand that oil viscosity does have an impact on fuel usage, however on anything that has a some displacement and HP, it is negligible at best. No matter how well an oil may or may not perform in a 2 stroke Detroit is moot, they are pre-WWII history and are quickly becoming conversation pieces and museum relicts. The performance of a synthetic oil in a 2 stroke is even more irrelevant since almost no one in the trucking industry has money to flush down the drain in such ways for long. Detroit currently only sells two engines that were designed by them, the 50 and 60 Series, and the 60 was jointly developed with Perkins and John Deere. The trucking industry runs mostly Cats and Cummins engines these days, all four strokes. Tire pressure has more of an effect on fuel economy than oil viscosity. With excellent dino oils made up of mostly gpII+ and gpIII base oils, that have good cold weather properties and even better wear additive packages, most companies would opt for the dino oil. The only companies that use synthetic oil widely are ones that operate in cold climates almost exclusively. From my training, research and experience in the heavy duty diesel industries I just cannot see a valid bases for most of your arguments androbot2084. I know very little really, that is why I continue to research and BITOG is one place for good information in most cases, more reading may be in order. This is probably just getting plain ridiculous now....
