oil change interval on 1990 Mazda RX-7

How often should the oil be changed?

by in Benicia, CA on September 13, 2010
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2 answers
ANSWER by , November 24, 2010
3-5K for conventional oil. Up to 8K for premium synthetics. Pull the dipstick and if th eoil is darker then a good Amber Ale then it's time. The dirt on the oil gradually destroys the bearings. Happy Holidays.
ANSWER by , September 13, 2010
3000 miles is a good#