Diaqueen/Diamond SP3 Replacement

Joined
Dec 14, 2023
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Hi all,

First off, I am UK based so certain brands etc. are not available here.

Anyway.. Got an EVO 8 and the AYC/ACD fluid is low. The original is the Diaqueen/Diamond SP3 fluid however, i cant seem to source it.

On the Cap it says ATF SP-III, but there is so many fluids out there, and I am unsure of the original viscosity, density etc.

Any recommendations?

Thanks!
 
ATF SP-III is essentially the old DEXRON-III. That's no longer a valid license and has been superseded by DEXRON-VI. You can still find "DEXRON-III like" fluids that would be suitable, or just buy DEXRON-VI which is superior in every way.

Or just buy a universal fluid such as Maxlife which is what I would do. This says it is suitable for SP-III applications and it will work fine. SP-III is not a special fluid.
 
Amsoil ATF or Redline D4 ATF are the two most used non-OEM options.

EDIT: Although I would probably ask around the FB Evo pages or forums to see if anyone in the UK has a stash of DQ ATF SP3 first. I think evolutionm is still active.
 
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Well if everyone has always known that besides me, then Maxlife is still a suitable substitute per Valvoline.
Universal fluid is always a lazy answer, but if that's the hill you insist on dying on, the choice is yours.
 
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Idemitsu makes a sp-III , that's what I used for drain and fills in my 05 sportage when I had it. They apparently had sourced mitsubishi transmissions back then.
 
The Idemitsu fluid is not licensed SP-III either, so there's no guarantee it is the same as the OEM fluid.
There is no SP-III 'license', only the genuine oil and others that claim to be a suitable alternative. Plenty of choices from the "suitable for use" camp.
 
Thanks everyone, hope I've not spawned too much trouble for people 😂

If it says approval or meets the specs for Mitsubishi Diaqueen SP3 then in theory it should be fine, right?
 
There is no SP-III 'license', only the genuine oil and others that claim to be a suitable alternative. Plenty of choices from the "suitable for use" camp.
Correct. Asian manufacturers do not license their fluids. Either you buy actual SP-III fluid from the dealer or it is all "suitable for".
 
Yeah, thanks all.

I ended up going for Motul Multi ATF. Only reason being on 2 different websites in uk who specialise in Japanese / Evolution car parts, that was the fluid they had listed so surely it can't be too bad ..

Although I totally forgot to ask the dealer if they do it.. should have tried that first
 
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