買了新車順便研究了一下磁鐵濾油器，結果失望。

說效果一般





























是看不見的

希望大家不會生氣


原文：
Oil-Filter Magnets Don't Hurt, But Don't Help A Lot
Posted to: Car Talk

169; April 25, 2007

By Tom and Ray Magliozzi

Dear Tom and Ray:

I recently saw a car catalog that had an oil-filter magnet for sale. The magnet was placed on the bottom of an oil filter and was strong enough to remove any metal shavings from the oil stream. Is this product worthwhile, or am I just wasting my money? --173; Ron

TOM: These things have been around for years, Ron. They certainly don't do any harm.

RAY: They sell magnets that go inside the oil pan, magnets that are built into the oil plug, and magnets, like this one, that attach to the filter.

TOM: Now, keep in mind that the oil filter itself already removes any metal shavings, or anything else that's bigger than about 25 microns 173; or about half the width of a human hair. So they do a pretty good job.

RAY: Does stuff that's smaller than that 173; stuff that gets through the filter 173; harm your engine? Probably, at least a little. But with the magnet, you'll only get the metallic stuff that sneaks by the filter. You won't catch any soot or pieces of aluminum, which are also harmful.

TOM: If a magnet really made engines last longer, don't you think that GM and Ford would already have spent the three cents per car it would take to build one into the oil plug?

RAY: So I'd have to say that oil-filter magnets fall into the general category of "overkill."

TOM: But if you're the kind of guy who believes in overkill, Ron, then go for it. Do you wear a surgical mask on an airplane? Do you go back and double-check to make sure you've turned off the stove before you leave the house? Do you have your brother taste your food before you eat it? If so, you should get one of these magnets, Ron.

RAY: In fact, you should get two, in case one falls off.

TOM: Seriously, it certainly can't hurt anything. And it's possible that there's some small benefit. But in the big scheme of things, it's not high on the priorities list. Changing your oil regularly will probably extend the life of your engine more than any magnet.

原文links：http://hamptonroads.com/node/256401_(a) _(a) _(a)

所有跟帖： 

• Anyway, now engine is no longer the botttle neck -PlayForever- ♂ (144 bytes) () 04/13/2009 postreply 23:00:45

• 那個點不是發動機壞了，我的願望是 -我來自火星- ♂ (73 bytes) () 04/13/2009 postreply 23:11:50

• Tom&Ray are right:Changing your oil regularly is the best way -waycool- ♂ (65 bytes) () 04/14/2009 postreply 03:57:40

• Every 3kmi, not less, otherwise you throw a way good oil -internuts- ♂ (69 bytes) () 04/14/2009 postreply 06:53:13

• Not less? Are you kidding, right? -waycool- ♂ (332 bytes) () 04/14/2009 postreply 10:30:03

• 磁力線穿不透濾油器，對濾油器內部無用。 -夏商周- ♂ (0 bytes) () 04/14/2009 postreply 05:59:35

• 回複：再看看其他“洋大人”的話， in real world -autoking- ♂ (68 bytes) () 04/14/2009 postreply 07:32:05

• 俺也認為，磁鐵根本沒用，但也不至於有害 -coorslight969- ♂ (192 bytes) () 04/14/2009 postreply 08:26:00

• According this artical it may 有害. quote: -WayCool- ♂ (233 bytes) () 04/14/2009 postreply 11:06:01

• 實際上是不可能的。 -coorslight969- ♂ (114 bytes) () 04/14/2009 postreply 11:15:14

• 回複：買了新車順便研究了一下磁鐵濾油器，結果失望。 -mesu- ♂ (198 bytes) () 04/14/2009 postreply 16:00:47

• 那磁鐵不是放在濾油器上。 -three- ♂ (274 bytes) () 04/14/2009 postreply 19:51:41

• 在這個問題上,我支持autoking -biglow- ♂ (409 bytes) () 04/14/2009 postreply 20:17:14