I can tell you what I do, and have been doing for almost 20 years on the same 1992 XR6. I run it at least weekly for the fishing season, usually 2-3 times per week during the summer. When it gets too cold to fish, I start a mental timer and once a month, I push the boat back out of the garage until the motor hangs outside the door (boat is parked nose-in for space reasons). I hook up the muffs, crank the motor and let it idle until the water from the tell-tale is hot and steaming. I shut it off and repeat in 3-4 weeks. No fogging oil, no nothing, no problems. Do not pull the fuel line and run it dry until it dies. In the case of a non-DFI motor, and particularly in a carbed motor, one carb will run dry first, and now you have two cylinders getting no fuel. And no oil. EFIs will also start to run lean before they die. And if they are not getting gas, they are not getting oil. I do keep stabil in the tank during the winter, but only during the winter. I burn enough gas in the other 8-9 months or so to keep it fresh. After 17 years, this motor still has 120-125 psi compression in all 6 cylinders, still runs 5800 rpm, idles as good as a carbed motor can idle, which is not that smooth but does not go dead. Etc.2008 Pantera Classic2014 Mercury Pro XS 200
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