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Do stop-start systems cause engine wear?
My wife read an article that automatic stop start on a modern engine can damage the engine beause of inadequate engine lubrication. I told her that when the engine is warm and been running a while, the oil wont have time to drain from the engine back into the sump, so there will be a miniscule amount of extra wear. The article was by a mechanic with 50 years experience of repairing cars.
Who is right?
Who is right?
Asked on 29 April 2024 by rosecotte
Answered by
David Ross
There is a degree of truth in that an engine with a stop-start function will experience slightly more wear than one that does not, even though engines with this system built in are designed to ensure this is kept to a minimum. As you say, a few seconds of the engine being off will not result in all the oil returning to the sump, and it is far less wearing on an engine than starting from cold where the oil is also cold and is not yet circulating. If you are concerned about engine wear, regular oil changes will ensure your engine has the best possible protection, and most vehicles have the option to turn the stop-start function off.
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