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Thread: CX-5 Oil Change with Filter

  1. #196
    Registered Member yrwei52's Avatar
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    Arrow CX-5 Oil Change with Filter

    Quote Originally Posted by blackcx5 View Post
    does that hex head plug from Med Mazda have a magnet ?
    http://www.mazdaparts.org/mazda-oil-...ug-washer.html can't tell from the picture
    tomcat's picture of the plug that came with the car clearly shows a magnet to catch any metal shavings
    also, it has a black finish coating on it to protect from rust

    just out of curiosity, how does the Fumoto valve deal with metal shavings since there's no magnet and the valve stays in ?
    If I remember it correctly, the black end tip of the OEM Allen drain plug is not a magnet. It's black paint applied from inside of the oil pan while the drain plug is installed and stick out. But I could be wrong as I didn't test it while the plug was out.



    Hex head oil drain plug should be a flange bolt with larger diameter rim to apply even pressure to the soft aluminum crush washer:



    But if the picture shown is correct by Med Center Mazda, the hex head oil drain plug is not to be a good drain plug as the hex head doesn't have larger diameter rim to cover the aluminum crush washer unless the washer is very narrow:



    I don't like Fumoto valve for the fact that they're lying to our face claiming that the threads don't extend into the oil pan. It may be a little convenient to drain the oil, but it definitely will prevent draining out old oil and metal shavings more completely which is something I really don't like.

  2. #197
    Registered Member erhayes's Avatar
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    When I used a Fumoto valve on my Subaru, owners used to file a notch in the threads so that 99.5% of all the crankcase oil drained out. Ed

  3. #198
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    I use a Fumoto on two Subies, and have one for the CX-5. You're talking about a thimble-full of oil in the depression of the oil pan, that the longer Fumoto might block. I let my engines drain for 60 minutes, and they still drip, drip, drip after all that time, with a hot engine. If there's metal chunks in the oil pan, they will drop out on the first drain with the stock oil plug. (But only if they are right next to the drain plug hole. There isn't enough speed of flow an inch or more away to wash a chunk of metal out of the pan). Any chunks created after that point means your engine is going to fail anyway...

    I guess it's now normal forum behavior (every forum) for some people to obsess. I see it on equipment review, cycles, photo gear, flashlights, etc. sites.

  4. #199
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    Quote Originally Posted by blackcx5 View Post
    does that hex head plug from Med Mazda have a magnet ?
    http://www.mazdaparts.org/mazda-oil-...ug-washer.html can't tell from the picture
    No answer for you, have to wait until the next oil change.


    Quote Originally Posted by blackcx5 View Post
    tomcat's picture of the plug that came with the car clearly shows a magnet to catch any metal shavings
    also, it has a black finish coating on it to protect from rust.
    Maybe 'clearly' in speculation, but in reality it is NOT a magnetic plug. I just went to the garage to check.

    Regarding rust, can't see how it would rust in the pan with the oil on it. Not to worried about the outside.
    Last edited by old-school; 01-30-2017 at 09:21 PM.

  5. #200
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    Quote Originally Posted by yrwei52 View Post

    Hex head oil drain plug should be a flange bolt with larger diameter rim to apply even pressure to the soft aluminum crush washer:


    But if the picture shown is correct by Med Center Mazda, the hex head oil drain plug is not to be a good drain plug as the hex head doesn't have larger diameter rim to cover the aluminum crush washer unless the washer is very narrow:
    Good point. Got an oil change coming up in a couple weeks. Will get back on this with pics of both. Well, if I remember...
    Last edited by old-school; 01-30-2017 at 09:32 PM.

  6. #201
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    Quote Originally Posted by cx-500 View Post
    I use a Fumoto on two Subies, and have one for the CX-5. You're talking about a thimble-full of oil in the depression of the oil pan, that the longer Fumoto might block. I let my engines drain for 60 minutes, and they still drip, drip, drip after all that time, with a hot engine. If there's metal chunks in the oil pan, they will drop out on the first drain with the stock oil plug. (But only if they are right next to the drain plug hole. There isn't enough speed of flow an inch or more away to wash a chunk of metal out of the pan). Any chunks created after that point means your engine is going to fail anyway...

    I guess it's now normal forum behavior (every forum) for some people to obsess. I see it on equipment review, cycles, photo gear, flashlights, etc. sites.
    Did you have to buy the adapter for the drain valve to fit?

    I sold my 9-5 Saab with 186K miles and always changed the oil with the Fumoto. Getting a Saab to 186K is not an easy task. They have been known to have sludge issues.

  7. #202
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    Where did you guys buy the crush washer?

  8. #203
    Registered Member erhayes's Avatar
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    I got mine at the dealer but, will look to our advertisers in the future. Ed

  9. #204
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    Quote Originally Posted by Greencat View Post
    Where did you guys buy the crush washer?
    Sometimes the dealer will throw one in for free, but I usually get a pack of them at Advanced Auto, 14mm is the size.

  10. #205
    Registered Member erhayes's Avatar
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    Technically these are not "Crush "washers but, flat aluminum washers. Ed

  11. #206
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    The site sponsor at the top of this page is a good source for maintenance parts. I can't get the link above to guide me to the right page. Try this link instead.

    Maybe the site owner or a Mod could advise Med Center Mazda to change the link?
    Last edited by old-school; 02-14-2017 at 10:38 PM.

  12. #207
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    Quote Originally Posted by erhayes View Post
    When I used a Fumoto valve on my Subaru, owners used to file a notch in the threads so that 99.5% of all the crankcase oil drained out. Ed
    Quote Originally Posted by cx-500 View Post
    I use a Fumoto on two Subies, and have one for the CX-5. You're talking about a thimble-full of oil in the depression of the oil pan, that the longer Fumoto might block. I let my engines drain for 60 minutes, and they still drip, drip, drip after all that time, with a hot engine. If there's metal chunks in the oil pan, they will drop out on the first drain with the stock oil plug. (But only if they are right next to the drain plug hole. There isn't enough speed of flow an inch or more away to wash a chunk of metal out of the pan). Any chunks created after that point means your engine is going to fail anyway...

    I guess it's now normal forum behavior (every forum) for some people to obsess. I see it on equipment review, cycles, photo gear, flashlights, etc. sites.
    On the Fumoto website FAQ section it mentions you don't need to file the valve's threads down.

    Q: Does the Fumoto Engine Oil Drain Valve protrude into the oil pan and impede drainage of the engine oil?

    A: No. Fumoto Engine Oil Drain Valves are designed to fit individual drain pan specifications and in almost every situation will not extend into the drain pan. However, replacement or aftermarket oil pans may differ from the original oil pan specification and as a result the valve stem may protrude further into oil pan than normal.

  13. #208
    Registered Member erhayes's Avatar
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    Sounds like Fumoto valve engineers have rectified the problem of leaving 1/4 quart of oil in some crankcases. Yaaaa. Ed

  14. #209
    Registered Member yrwei52's Avatar
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    Arrow Fumoto Engine Oil Drain Valve

    Quote Originally Posted by CX-5um View Post
    On the Fumoto website FAQ section it mentions you don't need to file the valve's threads down.

    Q: Does the Fumoto Engine Oil Drain Valve protrude into the oil pan and impede drainage of the engine oil?

    A: No. Fumoto Engine Oil Drain Valves are designed to fit individual drain pan specifications and in almost every situation will not extend into the drain pan. However, replacement or aftermarket oil pans may differ from the original oil pan specification and as a result the valve stem may protrude further into oil pan than normal.
    I thought this topic has been discussed earlier at post #192? Like some one said, Fomoto lies to our face as many users had found out their Fumoto Engine Oil Drain Valve does protrude into the oil pan and impede drainage of the engine oil! This is also true to CX-5 application. You can measure the thread length of the valve and oil pan to verify.

    Quote Originally Posted by tomcat1446 View Post
    Very informative link about Fumoto drain valve although this "Mythbusters: Fumoto Engine Oil Drain Valve" is for a 2008 Subaru Impreza WRX STi:
    Quote Originally Posted by NateCal
    Myth #1- The Fumoto Engine Oil Drain Valve, once installed, extends into the oil pan so that it is not flush and could allow for build up of unwanted particles inside the pan.

    So as far as Myth #1 goes, it is:
    The Fumoto valve extends aprox 1/8" to 3/16" into the oil pan.

    Myth #2- Due to Myth #1, metal shavings and other particles will remain in the oil pan when using the Fumoto Oil Drain Valve to change your engine oil.

    Plausible!
    Also this observation is consistent with the statement I saw before for the CX-5 with a Fumoto drain valve:
    Quote Originally Posted by NateCal
    To me, that says the 1/8" to 3/16" of the valve extended inside the pan is NOT stopping the oil from bringing all the crap out with it when it is draining.

    However, I cleaned my oil pan again, and planned to remove the Fumoto valve and flush a full quart of fresh oil through just to see what else would come out without the valve installed.

    When I removed the valve I was kinda of shocked by the amount of oil that was still in the oil pan. There was probably a good 10 second stream of oil that came out once the valve was removed.

    Then I ran the full quart of fresh oil through (without the valve installed). I then repeated the process of carefully dumping the oil, leaving the crap behind, to examine the oil pan. And the was NOTHING. The pan was clean as a whistle. Everything came out when I initially drained the oil using the valve. Even with the little oil that was trapped in the pan by the Fumoto valve.
    Quote Originally Posted by nutcore
    thank you for some actual evidence Nate. It's good to know that Fomoto lies to your face claiming that the threads don't extend into the pan.
    Q. Does my Engine Oil Drain Valve protrude into the interior of the oil pan and prevent full drainage of my engine oil?

    A. No. The threaded oil drain plug hole is always reinforced to accept the threaded bolt of the drain plug. In most cases, the Engine Oil Drain Valve will not extend past this threaded portion of the drain hole and will allow the oil to be properly drained. Your Engine Oil Drain Valve will let you drain your engine oil while it is hot without burning your hands and it is much more effective than trying to pump the oil out from above.

  15. #210
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    Quote Originally Posted by erhayes View Post
    Technically these are not "Crush "washers but, flat aluminum washers. Ed
    ...looks plenty crushed to me...

    ...but technically, you might be right...
    Attached Images Attached Images

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