performance update- i left the sled in the back yard for 6 days w/o starting it. temps here have remained about 20 below. previously i was running it after work each night w/o any trouble. i tried to start it saturday and it was dead. made some noise but no engine turnover. 1st i tried to charge and start it - that didn't work. i took the battery out, rewarmed it indoors completely, and proceeded to kill the battery trying to start a still frozen motor. i put a coleman cookstove under the metal plate below the motor, recharged the battery again. turned it over several times with almost starts and then finally it came to life. 2 different warning lights and an alarm went off intermittenly for a couple more minutes as a pulse sputtered back to it. i parked it in heated garage overnight. i ran it on tanana flats for 4 hours straight and no issues, still 25 below this morning. i think the "40 below" reputation does not apply if left sitting. not sure about day to day use and restarting. i might go to autotrim and get some plug in warmers, maybe auto start as well. a back up pull start would abrogate any possible requirement for heater plugins or auto start. on the upside, after running every night for a week prior, i topped off the tank with 2 gallons and no oil.