Not surprised. Popular Mechanics had an article a few years ago written by one of their guys who bought a new lawnmower and forgot to change the oil every year, then intentionally did not do it. I think he went 8 years and had it tested. It came back slightly out of spec, but still had all of its lubricating qualities.Well here's one for you!
I met a guy that owned a taxi cab company and here's what he told me;
They were running Fords and the parts were so cheap they decided to quit changing motor oil, just add oil as needed.
He said they would easily get over 100K out of the engines and then just pop a new one in the cab and put it back in service. (By law, where he was, the vehicles had to be taken out of service before they reached 400K so they might put 350K on the cab with only one engine change, but some did need two engines.)
Oil is the lifeblood of the engine, and changing it is easy. People do it out of old habits and it feels good when you think you’re doing something to take good care of your machine. Plus there’s no way to prove it isn’t necessary. Truth is, though, it’s just about feeling good - changing it under the manufacturer’s spec has been proven to not serve any practical purpose.
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