_I have a little car that is a manual transmission. I need to know what kind of transmission fluid to put in the car. I have no idea what type of transmission food to put in my manual. Does it matter what kind of oil I put in there at all. Can I just put a high viscosity oil in there. This probably sounds dumb but I just have really no idea what to put in there. I think I might be low because my clutch is starting to shift not as good.