I completely agree. We run 2 tugboats with 3 x V12 Caterpillar engines, one vessel has centrifuges and one doesn't. 600 Litre sumps so high volume of oil, but we get twice as long for servicing on the engines with spinners because we remove the carbon and crap. Ours is all sample based oil changes with samples taken every 250Hrs, so we can closely monitor oil condition. We change the oil every 12 months unless required to prior.
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