Series 60 Fuel dilution.
1999 series 60 with 1.1million original miles. Just bought it. The old owner was running 15W40 full synthetic oil. He had very good maintenance records and showed me that the oil only had 15k miles on it and said he had been changing the oil every 30k. I bought the truck ran it for 15k miles more and at 30k changed the oil and sampled it. The oil sample came back 3.5 fuel dilution from Polaris labs. What should I do. I've never had an engine with fuel dilution before. Thanks.
Is this a good question?