Posted by MarkB_MI on November 26, 2014 at 02:32:20 from (70.194.14.80):
In Reply to: OT--gasoline engines posted by Jiles on November 25, 2014 at 20:34:40:
No, it's not just the oil. After all, it's been only recently that manufacturers started specifying synthetic oils, and many still don't require synthetics. And let's not forget that 2000 mile oil changes were the norm in the sixties, while today we regularly go 8K or more between changes.
Manufacturing methods play a big role. A friend of mine is a powertrain engineer with a major car maker. He told me they discovered that engines made at one of their overseas plants had significantly less oil consumption than those made in the US. It turns out they were using different equipment and process at the overseas plant to hone the cylinders. Even though both plants produced blocks that passed inspection, the ones produced overseas were better.
Every little bit helps: Cleaner fuel, better fuel management, better control of spark timing all contribute to longer engine life.
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