Something that you should also know (regardless of which generation and engine
you have): for better filtration capabilities and possibly longer filtration life, you can
use a filter from a Mazda V6 engine. You can also try the Corvette ZR-1 filter
which is also said to be a direct fit. Remember when you are using a larger oil filter,
you will have to add a bit more oil into your engine! There is only 1 kind of Mazda
V6 oil filter at the Mazda dealers, so there is no need to figure out which one works
with the Protege. The larger oil filter costs the same as the (original) factory size one.