Originally Posted by gonefishin776
forgive my ignorance.
i've only ever heard of plugging diesels in when it's cold. but i also don't live in a very cold place either.
there are block heaters on gassers?
I'm jealous...I WISH I never had the need to have one lol
In all seriousness though it's a necessity, it more or less keeps the oil warm so that it can start on the really cold days (I start plugging my truck in as soon as it gets below freezing so that it warms up faster).
Also (and I'm sure that somebody more mechanically inclined will chirp in here if I'm wrong) but my understanding is that it's very hard on an engine when it starts up frozen, so it more or less adds to engine longevity IMO.