Be sure to replace the Mazda 3 oil filter with a genuine or equivalent quality filter. We reccomend changing the oil filter every 3000 miles on your Mazda 3.
The Mazda 3 valve cover gasket fits between the top of the cylinder head and the bottom of the valve cover. The _The Mazda 3 valve cover gasket fits between the top of the cylinder head and the bottom of the valve cover. The Mazda 3 valve cover gasket is responsible for sealing oil inside the valve cover to prevent leaks while the engine is running.