High quality magnetic oil drain plug.

I've been using an MTC VM502 M18x1.5 magnetic drain plug for 10 years now without any issue:

1745077587606.webp


But I've seen a lot of other ones break so I'm not sure if I'd bother, especially on thinner plugs. Nothing to gain IMO
 
Gold plug just came in today, look very high quality.

I keep hearing the magnet come off other brand. Is ever happen to gold plug ?
 
MetalSlug said:
I ain't buy nothing from Temu lol
Click to expand...
I've purchased a lot of products from Temu. So far they've all been just as good in quality as anything you can purchase anywhere else but much cheaper. Anyhow, if you don't want to buy from Temu, I'm not concerned.
 
Just got a Votex for my 4Runner. Will be installing in a few days when I go through the laborious task of changing the oil in this thing!
 
Perhaps SPASM3 is just being diplomatic!
If anyone cares to be careful about what they are putting into their engine especially if the magnet itself is being used as retention to the drain plug, try a simple Google of neodymium magnet temperature capabilities! I’m guessing he is leaning towards the Samarium Cobalt for a certain reason! I myself, being an aircraft mechanic of 36 years lean towards what works well in the sky considering there are NO breakdown lanes in the air! Thank you SPASM3 for your diplomacy, but I had to say it!
 
1daszooo said:
Perhaps SPASM3 is just being diplomatic!
If anyone cares to be careful about what they are putting into their engine especially if the magnet itself is being used as retention to the drain plug, try a simple Google of neodymium magnet temperature capabilities! I’m guessing he is leaning towards the Samarium Cobalt for a certain reason! I myself, being an aircraft mechanic of 36 years lean towards what works well in the sky considering there are NO breakdown lanes in the air! Thank you SPASM3 for your diplomacy, but I had to say it!
Click to expand...
Now temperature is something I hadn't considered! According to the interwebs neodymium begins to lose some magnetic power at 176F, but isn't entirely gone until 310F.

I wonder how linear that is, ie what are they doing at ~230F?

Most plugs are non-ferrous SS, so I ASSume an epoxy is used. I've always wondered about the quality of said epoxy -- or whatever retention method is used -- and how it might weather repeated heat cycles.

All that said, I'm still not sure I'm that concerned. If the magnet should come free, it's likely just going to sit in the oil pan. If it made it to the crank, I think it would just get ground up and get caught in the filter if it made it through the oil pickup.

I put an inexpensive Amazon unit in my non-profit's LMM Dmax the other day. I guess we'll see if the magnet is still there during subsequent changes.
20250513_100819.webp

In person it's got that distinctive "satin" sheen of SS and is not magnetic (I checked). The machining is quite good IMO
20250513_100843.webp
 
Curious, I emailed Gold Plug today and asked what they used. They confirmed they use neodymium "good to 300 degrees," which leads me to think they're just stating the currie temp and there's nothing special about them.

That's fine, but the point is I'm not sure a "brand name" gets you a better magnet. The Amazon imports are also so strong I struggle to get them in the hole (never a good thing!) so I think they're rare earth.
 
Stick with name brand ( Gold plug, vortex ) cheap brand magnet coming off. I did a lot research last couple days I was bored lol
 
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