Guy at work says it burns a quart per 2500 miles. Runs Dino. Says he overfilled it with 6 instead of 5 by mistake one time and thinks that's the reason. He does 2500 oci and only puts on 5000 per year. I recommended going to a hm oil like maxlife or pennzoil 5w30 and doing 4000 or 5000 oci. My only concern was the short tripping fuel dilution . He plows with it too. Adding oil would freshen it. Thoughts?