Each time you change the oil, you should always replace your Fiero oil filter at the same time. Your oil filter is designed to keep the oil in your vehicle clean. Dirty oil makes sludge, and sludge can slow your pistons down, robbing your car of power and efficiency. The friction caused can also warp sensitive internal engine parts and cause expensive repairs. For all your Fiero oil filter needs, you can trust AutoAnything to provide the highest quality parts at the best price in the industry, backed by our 1-year lower price guarantee.