You have to follow vehicles spec's cocerning oil and fluids,if your vehicle takes dot 4 brake fluid,why should i put dot 3, Always refer to your owners manuel,if you dont have one,go to the internet and download it and typing your vin,even easier look inside your engine,there are some useful diagrams and spec requirements there,while your there go with the flow and top off the proper fluids for the cold winter,she will love you more,Lol.