MsSchroder said:
It will attract all the tiny little metal engine filings so that stuff doesn't circulate back through your engine. Or God forbid, something like rocker arm needles.
I put one in mine. The last time I changed the oil there was a tiny layer of metallic dust clinging to it. For 3 bucks, it can't hurt
Tammy
Indeed magnetic drain plugs can't hurt, but we need a reality check here on how oiling systems work. Even without a mag. drain plug, metal filings large enough to be identified as filings rather than tiny particles of a metallic paste, will go no farther in your engine than the oil filter. So...
:nono
...don't think, if you
don't use a magnetic plug that your engine is going to fail sooner than it would with a mag. plug. Such failures are myths propagated by the companies which sell magnetic drain plugs.
These "metal filings", as long as your engine is past break-in and wearing normally, are a paste of microscopic ferrous particles that should never accumulate in a quantity lager than can make a smudge on your finger when you rub the mag. plug's magnet. The particles can come from the steel and iron parts of the valve train, the cast iron crank and any other ferrous parts in the engine. Typically engines with cast iron blocks will have more of this residue then will aluminum block engines.
If the engine is wearing normally and the oil filter is being changed regularly, if you don't have a magnetic plug, virtually of that stuff gets trapped in the oil filter. If you do have a mag. plug, its magnet is catching some of that stuff
before it gets to the filter. You see it on the magnet and think "Wow. That plug is working. I really needed it." but, that's not really the case.
Bottom line: A magnetic drain plug won't hurt anything but do you need one to ensure durability of your engine? Not.