Hi I have a Mazda Demio 2009. I want to change the Gear Box Oil. When called Colonial they said that they use Oil named "M Five" for 12K and "FZ" for 17k. When I called a local garage guy he said he is using Valvoline and it will cost 7k with labor. Please comment the suitability of the oil. Both places said that they manually clean the sump and clean solenoids as well. Would like to hear your expert view.