1990 Mazda RX-7 Q&A
1990 Mazda RX-7 Question: oil change interval
How often should the oil be changed? - Visitor
3000 miles is a good# - shadetreeauto
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. - Hal...