My volvo fitted with Aisin transmission requires "so called" special volvo ATF which I've been told is Mobil 3309 without the huge Volvo price mark up. Mobil 1 supplied by most big box auto stores may try to tell you that Mobil 1 ATF is the same as Mobil 3309. It is not! and when you ask for Mobil 3309 they go glassy eyed as if you are speaking a foreign language. When they do get it they will inform you they would need to puchase a pallet! For those needing 3309 for Aisin transmissions, AVLube.com is a great company to work with, fast to your door 12 Quart cases and competitively priced. Mine arrived at $79.00 including UPS ground, for a box of 12. However my question is, will Mobil 3309 mix with say AmsOil Synthetic ATF or for ATF used in Toyota - T-IV, or ATF used by ford in Aisin applications? The Toyota ATF is often sold by local dealers for $4.75 Quart. It would really help to know?