1990 Mazda RX-7 Q&A

1990 Mazda RX-7 Question: oil change interval

How often should the oil be changed? -
Answer 1
3000 miles is a good# -
Answer 2
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. -