We had two White diesels, 16 cylinder, 785 Cubic inch PER cyl. driving 1.2 megawatt generators. They were originally built as diesels, but converted to run on natural gas (90%) but still needed diesel fuel for compression ignition (10%) They only ran at 660 RPM, but both had over 10,000 hrs, without a major overhaul. Oil was changed regularly, though it looked pretty damn clean for a diesel. Valves, heads and rings were never carboned up at all. Virtually smoke/soot free. If you didn't feel them running, you could almost forget they were there.
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