Hi : I need to know the mm size of the oil drain plug . Also I see on Ebay all of these magnetic drain plugs for like $30.00 Anyone have any experience with this type plug , worth the money ? Thanks Ed

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Comment by mike on January 23, 2010 at 2:49pm
So.........anyone using one of these?
Comment by Tori on September 15, 2009 at 2:55pm
Steven, of course that mag. gadget works... Aluminum block almost always come with cast iron liner not mentioning the steel piston rings and valves all generating micron size bits that may or may not be picked up by the oil filter.
Comment by SmartieParts on September 14, 2009 at 7:13pm
Hi folks. I was asked to comment on this issue. I sell the Dimple brand magnetic drain plug for the smart (M22 thread by the way, to answer the original question).

It won't perforate a filter screen. If you look at your original plug, it has a filter screen attached to it. That screen, by all accounts, is there to filter out large material that is leftover from the manufacturing process and the very first oil change you do should take care of them. The holes are WAY too big to stop the vast majority of materials that are in your engine. Putting the magnetic plug on replaces the original as well as the screen, so its no longer there. You can keep the screen but then you have to trim it because yes, the magnetic plug is longer than the original. For ferrous metalic material, the magnet will do far more to protect your engine than the screen will. For non-ferrous materials, the magnet will do nothing and the screen will only stop very large pieces, which really shouldn't be in your engine!!

Is it worth it? To be honest, I can't say whether the manufacturer's claims are true or not. For ferrous materials it certainly makes sense. Considering the block is aluminum, where would those materials come from though? They say its proven effective. All I can really say is it is cheap protection if it does anything, and not a huge waste of money if it doesn't. If you're concerned about the filter screen then just stick with stock.

I hope that helps.

- Steven
Comment by Tori on September 14, 2009 at 3:55pm
There is NO metal shavings! Those shiny specs are the anti-seize compound on the thread of the drain plugs.
Comment by SMARTY on September 14, 2009 at 2:12pm
Did u break your drain plug? why would u replace it? the magnetic one mAy not work properly.

stay SMART! ;)
Comment by Phillip Hanson on September 14, 2009 at 11:51am
My mechanic advised me not to use the magnetic drain plug I bought because the length of the plug would perforate a filter screen. The original plug is shorter than the magnetic plug.
Comment by Ryan on September 13, 2009 at 7:53pm
I honestly don't know if the magnetic drain plug is all that worth it. The stock drain plug already has a pan filter on it, which would be the extension Bob & Jan mentioned.
Comment by Bob & Jan on September 13, 2009 at 6:16pm
The wrench size is 24mm. The smart drain plug is odd. It has an extension that other drain plugs do not have. If you change your oil and filter at 4-6000 miles the first time most of the "metal shavings" are drained out. I change oil and filter every 6000. I know smart says every 10,000 but we do mostly short trips (less than 20 miles).

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