Hyundai / Kia SP4-M ATF : Group III or Group IV (PAO) ?

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As the title states , is the newest Hyundai SP4-M ATF made from Group III or Group IV (PAO) base stocks ? Trying to better understand the composition to determine if it is truly a better ATF than Maxlife All Vehicle ATF (rated for SP4-M) or the similar Castrol ATF ? ... Or just a highly inflated priced dealership Group III ATF (now at $20 per qrt.) ?
 
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2 years ago I found an advertising sheet that was describing SP4-M and it said Ester based ATF and it was then pulled from the location I posted it online after about a month of being a good link. After about a hour of search the internet for another copy I gave up. Whether it was a mistake or they change it to a PAO or G3 who knows. I guess if someone wants to send a sample to Polaris Labs we can look at the "oxidation" level and tell roughly if it has ester in there by that.
 
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Hyundai's own oil company product (Xteer SP4) SDS looks to be group III ??: "Distillates (petroleum), hydrotreated heavy paraffinic" - CAS 64742-54-7 - 80-90% content http://divisacolombia.com/pdf/particular/msds/XTeer%20ATF%20SP%204.pdf http://www.xteer.co.kr/eng/sub2_6?prod_id=PRODUCT71 You might say "but that's for SP4, not SP4- M". Except for the U.S. marketed Hyundai and Kia fluids, NONE of the Hyundai approved fluids have changed their designation from SP4 to SP4- M (Michang, SK Zic, etc.). Here's an example of SK Zic which claims to be the factory used product: http://zic-eu.com/products/transmission-oils/zic-atf-sp-4.html Here's another Korean made product NOT on Hyundai's approval list. It, too, appears to be a group III oil in the SDS: http://www.korlube.com/en/product/product_view.php?ca_name=ATF+%26+Gear+Lubricants&wr_id=37 The Mopar SP4-M sds does not list a CAS No. and just states "petroleum base oil": http://www.weirparts.com/msds/Chrysler2016/MoparSP-IVMAutomaticTransmissionFluid.pdf Mania, if your statement about SP4-M is correct about it being a group IV or V base oil, then it seems that ALL of the rest of the approved products are different (group III). I'm not calling you a liar, but this situation makes no sense to me at all.
 

ChrisD46

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I'm leaning hard on using the Maxlife All Vehicle ATF which has updated to provide a SP4-M recommendation . I would use in my newer Sonata and other Hyundai / Kia vehicles as a drain and fill every 30K miles which should prove safe . Again , if the Hyundai SP4-M is nothing special then I'll save my money !
 
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