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"Most engine wear occurs when starting the engine"
I read somewhere that this is true, but not because the engine is grinding itself away due to lack of lubrication, more like wear from acidic blow-by - on cold starts. Warm starts, much less of either.
Even so, pre-oiler devices do exist.
But for repeated warm starts, I would say they aren't needed. To aid cold starts, engine pre-heating might be a better solution.
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