- Mar 25, 2001
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I've been getting my oil changed at the Mazda dealership (because they owed me 2 free ones due to a jackass salesman) and they are using synthetic oil and claiming I don't have to get it changed until 7000 miles. I've always done the 3000 mile oil change and waiting so long past there makes me kind of leery. Is this correct, am I safe waiting until 7000 miles? I don't want to mess my engine up.