Engine Hours on Deisels are all relative
1100 hours is low relatively speaking. Especially if the engine was taken care of and oil changed often. But if one engine was run only 15 minutes out of a slip and 15 minutes into the slip 3 or 4 times a week and that is all, but it accumulated 1100's then it is a lot.As opposed to an engine that is run hard (70% of max output) for hours at a time.If I were to choose which engine to take. I would take the one that was run hard for hours. Its much better for Diesels....why do you think truck drivers leave their engines running instead of stopping and starting?But I suspect you will never know what kind of treatment the engine was given, so the next best thing is to have an oil analysis done. This can be pretty accurate on what might be going wrong with an engine (blown rings, lifter sticking, etc, ). Just make sure the oil wasn't just changed though. The engine needs to be run a bit before the oil will show whats up. It'll cost a couple of bucks, but its one way to be more sure of what you might be getting.