I have a Polaris Ranger 500 EFI that I use on property to do 50% work and 50% play. Engine is a 500cc, single cylinder, 4 stroke, OHV, and fuel injected. This is a new to me machine and I find myself driving to an area of the property, getting out to do work, then moving on to the next area. There are some tasks that take 10-15 minutes to do before moving on to the next area. My question is: is it better to let the engine idle or to turn off when off the machine doing 10 minute tasks? Anything over 15 minutes, I shut off the machine. The motor gets full synthetic engine oil. It gets to operating temperature (fan kicks on at times of idle), and sees its fair share of high revs when riding for pleasure. Which is easier on the machine....the constant idling or the on/off, on/off, on/off cycle?