Mr burn, the key phrase is "in normal conditions the machine will not generate enough heat to see the benefits." I have been to many engine transmission seminars and updates, I have asked many factory reps many questions. They all agree, synth is not bad, just an expensive overkill. In the same breath they say you dont have to buy our oil, their point was that synth is not needed under normal conditions My reply is under normal conditions you might not DAMAGE your system with a distilled mineral oil but I would like to see oil analysis on mineral vs. synthetic to verify that fact. You will realize a big difference in the performance of your machine. The more difficult it is for the engine and hydro system to pump the oil through the components the more HP it takes away from the job at hand. Again, If the temperature is lowered just by changing the oil, not adding more coolers, you have reduced friction. Friction robs power. I have significantly improved my fuel usage by using better oil products. Let's say mineral oil costs $2.00 a quart and synthetic oil with additives runs $6.50 a quart. In my Dixie Chopper I need a little over 10 quarts for the engine and hydro system. So that would be a difference of $45.00 dollars for synthetic vs. mineral. I have improved my fuel consumption over 30 percent by just changing the oil nothing else. I used to fill up every 4 hours, now 5 1/2 hours. I pay $1.89 per gallon of gas right now, and it's going up in all likelihood! Using mineral oil I burn 1.5 gallons per hour. With synthetic I burn .9 gallons per hour. Figuring 25 hours times 1.5 gallons at $1.89 = $70.87 Figuring 25 hours times .9 gallons at $1.89 = 42.52 Savings of $28.35 in fuel minus $9.00 additional for synthetic that means I save $19.25 over the 25 hour oil change. Times how many machines per month and the savings are significant.