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post #1 of 27 (permalink) Old 06-09-2019, 02:56 PM Thread Starter
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Oil Change Procedure?

I don't want to screw this up because of the issues this particular engine has had.

My plans were to buy a decent brand motor oil and filter (likely Mobil1 5W20 full synthetic high mileage and an appropriate filter) But I wanted to check with the form before I go.

The manual apparently says 5W20 or 5W30. Which should I be using? Are there any particular brands you would recommend that are not difficult to find?

I watched a video and it seems like changing the oil is a simple procedure - remove the drain plug and filter and allow it to drain, then reattach the plug and new filter and refill.

What should I know? I read something about replacing the washer on the drain plug or something, which boggles my mind. I also read about filling the filter when reattaching it. I already know to lubricate the lining.


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post #2 of 27 (permalink) Old 06-09-2019, 05:26 PM
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Washer on plug should be replaced ever time, don't bother pre filling the filter, will make no difference in the life of the engine.
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post #3 of 27 (permalink) Old 06-09-2019, 05:31 PM
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I always pre-fill filter(always have)...in my view seconds count!
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post #4 of 27 (permalink) Old 06-09-2019, 05:44 PM Thread Starter
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Originally Posted by armtdm View Post
Washer on plug should be replaced ever time, don't bother pre filling the filter, will make no difference in the life of the engine.
I've never done this in my life, never heard of it before.

What size do I need?


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post #5 of 27 (permalink) Old 06-09-2019, 06:33 PM
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Originally Posted by hg3300 View Post
I don't want to screw this up because of the issues this particular engine has had.

My plans were to buy a decent brand motor oil and filter (likely Mobil1 5W20 full synthetic high mileage and an appropriate filter) But I wanted to check with the form before I go.

The manual apparently says 5W20 or 5W30. Which should I be using? Are there any particular brands you would recommend that are not difficult to find?

I watched a video and it seems like changing the oil is a simple procedure - remove the drain plug and filter and allow it to drain, then reattach the plug and new filter and refill.

What should I know? I read something about replacing the washer on the drain plug or something, which boggles my mind. I also read about filling the filter when reattaching it. I already know to lubricate the lining.

I rarely post on this forum, because I have a 2013 Sonata GLS that has given me zero problems and consume almost no oil. I see a potential problem with the oil you're choosing, so that's the reason I'm responding to this post. From my research about different types of oil, I would be careful about using any type of high mileage oil, because high mileage oils contain seal conditioners and additives that cause o-rings, gaskets and seals to swell. Once you use a high mileage oil in your engine, it's difficult to go back to the normal oil. I just use regular Mobil 1 full synthetic 5w-30 oil and genuine Hyundai oem oil filter and drain plug crush washer/gasket I buy from the dealer or Amazon. My car is approaching 6 years old with almost 70k miles , and I have no reason to use a high mileage oil. Maybe the users with more experience about cars can give their opinion about the oil, but that's just my take. I change my oil about every 4,500 miles. Total parts for my oil change is around $30. I buy the oil at the cheapest price, which is usually at Walmart.
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post #6 of 27 (permalink) Old 06-09-2019, 07:47 PM Thread Starter
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I rarely post on this forum, because I have a 2013 Sonata GLS that has given me zero problems and consume almost no oil. I see a potential problem with the oil you're choosing, so that's the reason I'm responding to this post. From my research about different types of oil, I would be careful about using any type of high mileage oil, because high mileage oils contain seal conditioners and additives that cause o-rings, gaskets and seals to swell. Once you use a high mileage oil in your engine, it's difficult to go back to the normal oil. I just use regular Mobil 1 full synthetic 5w-30 oil and genuine Hyundai oem oil filter and drain plug crush washer/gasket I buy from the dealer or Amazon. My car is approaching 6 years old with almost 70k miles , and I have no reason to use a high mileage oil. Maybe the users with more experience about cars can give their opinion about the oil, but that's just my take. I change my oil about every 4,500 miles. Total parts for my oil change is around $30. I buy the oil at the cheapest price, which is usually at Walmart.
Already bought the high mileage, thought I was doing myself a favor. Car's just over 70,500 miles. Oil cap says 5w20 so I stuck with that.

If I can't go back to regular, I won't. No biggie. I think I paid about $38.

Only thing I need now is the stupid gasket. Can't they do things like other automakers? I've never had to replace a gasket on a drain plug.


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post #7 of 27 (permalink) Old 06-09-2019, 10:10 PM
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Both my 2012 Honda and my 2013 Sonata require the crush washer be replaced each time the drain plug is reinstalled.

If you plan on doing a lot of oil changes yourself, do what I did. By a 50 pack. I bought mine at the Honda dealer. Way cheaper than the local Hyundai dealer and the same part.


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post #8 of 27 (permalink) Old 06-10-2019, 09:13 AM
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I agree with the prefill the filter. As @armtdm said, its not going to cause your motor to go but its one of those things of "why not". While your oil is draining you can allow the new filter to be prefilled and soak in. It costs you nothing. Replacing the crush washer keeps you from having to over torque the drain bolt to get a correct seal which can obviously be a risk in stripping the bolt hole.

As for the high mileage solving problems with seal swelling its just like old school days of people saying putting syn in your car causes leaks. If it "fixes" a problem, then a problem exists. Meaning in the old days the syn would clean up deposits that would reveal leaking. That leak was there already. If HM solves your burning, I would do with it. You can switch back and forth as you so see fit. Its not a one way street. Put it in and see what it does. This isn't like putting in motor Honey or Slick 50.
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post #9 of 27 (permalink) Old 06-11-2019, 11:40 AM
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I never replace the washer.... but have a fumoto valve on there so it never gets taken off. And yes the oil cap says 5W-20... but the manual lists a large array of oils that can be used depending on your driving region and conditions.


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post #10 of 27 (permalink) Old 06-11-2019, 12:07 PM
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Never heard of people pre-filling filters until just now... Interesting. Since the filter on my car mounts upside down and it would be super easy to do, i should try that next time. It would prevent that slightly louder rattle upon first start up, but like others have said, i doubt it would increase the life of the engine. Even if your pump goes empty for a second, there's still oil (just not as much as normal) on places where necessary.
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