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Old 02-18-2020, 09:17 AM
v8volvo v8volvo is offline
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Join Date: Jun 2009
Location: Montana, USA
Vehicle: '86 745, '83 764
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Good to hear. Sounds like your methods definitely helped.

The diesel fuel that was available for the first 20 years of these engines' lives was much poorer quality and higher in sulfur content than the fuel we have now, and engine oil quality used to also be much worse, plus the dealer recommended oil change interval was too long. That resulted in a lot of the motors spending much of their time running on dirty fuel and with thick, dirty oil that wasn't good for long term durability. Some of them wore out early as a result. But now with much cleaner low sulfur fuel and affordable high quality synthetic oils on the shelf of every parts store, if you can get the inside of the engine cleaned up, and it's survived to this point without too much internal wear, it's easy to keep it clean going forward. If you do, these engines are pretty much impossible to wear out. Just have to keep them from breaking a timing belt or getting hot and keep them full of good clean synthetic oil, and if you do, service lifespan is more or less indefinite.

You might want to do another oil change pretty soon after driving a little to make sure you got all the solvent chemicals out, those might be hard on things like bearings and rubber seals if the engine ran a long time with some amount of them in the oil, though most of it probably would evaporate out.
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86 745 D24T/ZF 345k lifted 2.5"
83 764 D24T/M46 155k
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