We hear you on the rising gas prices, and we agree that performing your own routine maintenance is a fantastic way to save money. The 2008 Mazda CX-7’s
oil type is OE 5W-30 synthetic motor oil. Synthetic is a word that scares a lot of people, but it shouldn’t. Essentially, there are two types of motor oils, mineral and synthetic:
Mineral-based oil is heavily refined oil sourced from the ground
Synthetic oil uses artificially manufactured chemical compounds
Mineral oil tends to contain more impurities than synthetic oil and is, therefore, more likely to gunk up your car’s engine. Synthetic oil is simply safer.
Many manufacturers produce OE 5W-30 synthetic motor oil, so you should have no trouble finding it. Top brands include Castrol, Valvoline, and Shell.
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