Thanks to YouTube I bought a 15/16" wrench and did my first drain & Fill : 50% with Hyundai SPIII and 50% with Eneos SPIII . Prior to that I had my mechanic do it every 30K to 40K miles . I got about 5.5 qrts out of it and the fluid was dark red/brown . Also the drain plug magnet had about a 1/4" ~ 1/2" of gunk all around it which I cleaned off real good . I have not bought the Eneos SPIII before (always just bought SPIII from the Hyundai dealer) - the Eneos is a little cheaper and sold at NAPA which is much closer than the Hyundai dealer . How long should I drive before doing another ATF drain and fill and also your thoughts on Eneos SPIII ATF ?