Universal Diesel 5432, four cylinder. I carried 70 gallons of fuel and used only 40 this time. Fuel burn was a little more than 1/2 gallon/hour. In a total of maybe 70 hours of motoring less than a quart of oil was burned. I found Bose noise-cancelling headphones a good companion, reducing the thrum to easy levels during one 30-hour stretch of continuous engine-on.