(Yes, MiamiLX, I searched... Save it.. :bwekk: )

I have seen it both ways here.. Some say it is great, some say it will wreck your trans...

So, since I am due for a flush next month...

Amsoil ATF.. Yes! or No!.. And WHY?

If not Amsoil, what brand do you suggest? I am 100% going the Synthetic route, however!

(Relative posts only, please people.. No wars! Let's be adults, not Honda Owners!)

Thanks guys!

This post has been edited by M_Portiss: Apr 6 2008, 06:44 PM

I would suggest synthetic fluids, but I am not an Amsoil supporter.

I have no experience with their ATF, nor have I done a flush on my car yet.

i hear Castrol ATF works well with the Sonata... I haven't had mine flushed yet either...

Ahh.. nice points guys.. I should edit my post to give any info you have about ANY synthetic ATF!

Thanks for the help!!

Castrol "Import Multi Vehicle" ATF is what I used. I based my decision on the thread below. I don't care what claims fluids make as far as extended change intervals. I do it when I feel it's required. Call your local Hyundai dealer and ask if Amsoil is OK for you car. If they say yes, which they did with the Castrol, go for it. The bottom line is WARRANTY and cost. :thumbsup: BTW I used to own a Honda. :grin:

:liebe011: to Perry :beer:

http://www.hyundai-forums.com/index.php?sh...&hl=castrol+atf

Thanks for the reply. I am not too certain how much props you get in this community, however you are a great resource for the Hyundai Community... Reminds me of how things use to be on FXtreme (And among other boards..)

From one car guy to another, Thanks for taking the time to help out the community!

This post has been edited by M_Portiss: Apr 6 2008, 08:51 PM

So does anyone have AMSOIL ATF in there car? If so how do you like it?

Not feeling Amsoil at $9.00 per quart. Would suggest Castrol "Import Multi Vehicle" ATF.

I am running Amsoil synthetic ATF. It seems do be doing great. However, the transmission is still stubborn as can be with downshifting. I can't expect the fluid to change the behavior of my transmission, but it's still running quite well, from what I can tell. Let me think, I changed it at about 25k miles and now it has 33k miles on it. I did a full flush of the old fluid to get the new stuff in. I wouldn't do it any other way.

However, I'm hearing that this fluid will void the warranty as it pertains to the transmission. If I start having mechanic problems with it, I'd probably change out the fluid to the regular stuff before I took it in and complained about it.

hope this helps.

How would the dealer know what fluid is in the tranny? I have used amsoil in chevy tannys and never had a problem---in fact it seemd to shift faster and smoother.

They test it. They are looking for SP111. "Meeting or exceeding..." does not mean SP111 approved.

The Hyundai ATF is good stuff and cheap to boot. Why spend $9-10 a quart for an unapproved ATF that puts your warranty at risk? Makes zero sense.

I'm not sure they test it other than "ask" you what you used and to provide documents to that fact.

I might add that changing to the Castrol helped in at least two instances shifting wise. Claims made here. :thumbsup:

This post has been edited by craigbrooks: Apr 7 2008, 10:56 PM

As you can see I am an Amsoil dealer and I have heard there have been problems with the ATF in a Hyundai application and then I have heard of people that are using it with no problems. I do not know of any aftermarket fluid that is Hyundai approved for use. I have been told that they are looking at Amsoil ATF for approval but that has not been confirmed. I will probably use it when I do a flush on my car at 60k but that will be 12months from now and there will be more information avaliable by then. If you want to use the Amsoil ATF now I can work up a price for you that will be below retail, send me a PM. Also Amsoil will be starting a monthly "energy surcharge" on May 1st of 3 - 5% that they will adjust monthly so they can raise or lower prices quickly with out the need to print price lists every month which would raise prices even more.

As a potentional customer I read a flaw in this. What is your take on this?

Edit: Sorry, my Honda owners side coming out.

This post has been edited by craigbrooks: Apr 7 2008, 11:14 PM

No sorry needed. My only “hesitation” as it is right now is the information I have received via message boards about using the ATF in a SPIII application. I find it hard to believe Amsoil would recommend using it in an application where it would not perform better or at least as well as the factory fluid. I have read a few posts on the web where people claim that it caused a failure and Hyundai blamed the fluid and would not cover the repair. I truly believe that the fluid works as intended and it was the dealership that tried to push off the cost to the customer rather than have it covered. Most people just blindly believe what they are told and never follow up and request the documentation from the dealer in writing where they say the damage was caused by the fluid. Just saying the fluid was the problem in ANY application Motor oil, Transmission fluid, or any of the many other applications where a lubricant is required is just so wrong on so many levels that I don’t know where to begin. The component that failed has to be identified, examined, and the cause of that failure documented. A lubrication issue is different than a manufacturing flaw and they are not too hard to tell apart most of the time. I did ask the people that said they had problems with their dealer/manufacturers if they had requested written statements that the fluid caused their problems or if they went back to Amsoil and requested assistance and most of the stories just ended with I don’t know So, the hesitation you saw in my post where I said I will probably use it was in reaction to those stories I mentioned and because I have no personal experience with nor have any of my customers so I can’t stand here and say it is fine because I am using it for xxxmiles and its great, not in a lack of faith of the product and I will be using it when I do my first flush. I will document every aspect of my use of the ATF and will share the good and the bad, not that I expect anything bad. Everything I have used personaly has been top notch and has performed as advertised so I have no reason to doubt Amsoil product recomendations.

This post has been edited by Robert1955: Apr 8 2008, 11:11 AM

Agree 100%.

In fact, since Hyundai doesn't make ATF, it's an existing ATF re-labeled for Hyundai (just like their oil filters). Someone somewhere knows what it is, and if I find out, that is what I will use at 105,000 miles.

In your brand new rebuilt trans? :banana:

No, it's OEM, not rebuilt. I will be using Hyundai approved ATF at Hyundai recommended change intervals in it.