Originally Posted by CivicSiRacer
With pure synthetic oils (most off the shelf oils are not pure synthetics) you can go about 30,000 miles between changes - you just have to make sure you change the filter every 3000-5000 miles.
Synthetic oils do not break down as quickly as conventional oils do, so they last longer.
is mobil 1 synthetic pure synthetic? if not how many miles should i wait before changing?