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I’m new at this, I just want to change the oil filter and plugs on my Mazda 323 1.5 Protege
When you remove the filter the old oil will run out if you haven’t drained it first. Here’s a guide on how to do it: 1998-2003 Mazda Protege Oil Change (1.6 L DOHC) Why do you think the plugs need to be changed? For diagnostics, you can take it to an Auto Zone and get a free computer read out. They’ll also be able to sell you the oil and filter and/or plugs if you need them.