Possibly, but as a few have mentioned that for 5/10 min stop, if you consider that everytime you shut down your motor your oil drains back down and for a fraction you are running with a less that ideal lubrication. I know that it is splitting hairs but I am a contractor and would be all day checking jobs and gofor materials.
I do remember reading that most of the wear that occurs to any motor happens during the first few minutes where everything is expanding from being cold, again this might be splitting hairs.
Unless there is someone in the driver's seat or operator's station, SHUT IT OFF.
Not trying to be arguementative, but oils of today are a WORLD better than those before so everything you hear about it being "better" to idle is based on OLD wives tales and other mystical thoughts.
UPS does not idle a single truck for even a second, their "package cars" are stopped and started with every stop, they don't worry about wear and tear on the starter, battery, alternator or engine. Why? It takes VERY LITTLE to start a hot engine, so stress on the electrical system after the initial start of the day is neglidgeable.
Cylinder temps drop RAPIDLY at idle, this causes "wash down" of the cylinder walls as raw, unburned fuel contacts the wall and drains into the oil. Fuel dilution of the oil will do far more damage than shutting the engine down and restarting, even if it cools some.
I cannot ever recall seeing an oil related failure of a turbo, I have been doing this for 30 years on anything with oil in it or on it, oil coaking is very rare and due to ignorance and poor quality oils, nothing more. The turbo bearing failures I have seen could generally be bucketed into two groups: 1) Material defect, 2) revving the engine just before shut-down to "clear it out". This (very common) ignorant practise spins the turbo up to near peak speeds (80K-100K RPM!) than suddenly starves it of oil when the engine stops. Do it once and you damage the bearings, it will fail, but maybe not today.
