Sounds like they have used this:
http://www.valvoline.com/pages/products/product_detail.asp?product=6
and I quote:
I fail to see how one fluid can do the job of Dexron II and III as well as Diamond Queen SPII & III as they are completely different fluids!!!
I would get it changed for genuine Mitsubishi SP III ATF ASAP Hayley.
You will only need the fluid changed, not a "system flush" or new filter, so you'll need ~10L of SPIII ATF and about 1 hour of labour. Should cost you around $130, please get it changed before your trans shits itself from incorrect fluid.
http://www.valvoline.com/pages/products/product_detail.asp?product=6
and I quote:
Recommended for use where DEXRON, DEXRON II, III and VI, Toyota T-IV and WS, MERCON®, MERCON® SP and LV, Allison TES 295 and 389, Nissan Matic-D, Matic-J and Matic-K, Honda Z-1 (except CVT), Mercedes NAG-1, Mitsubishi Diamond SP-II and SP-III and many others are required
I fail to see how one fluid can do the job of Dexron II and III as well as Diamond Queen SPII & III as they are completely different fluids!!!
I would get it changed for genuine Mitsubishi SP III ATF ASAP Hayley.
You will only need the fluid changed, not a "system flush" or new filter, so you'll need ~10L of SPIII ATF and about 1 hour of labour. Should cost you around $130, please get it changed before your trans shits itself from incorrect fluid.