The Redline Racing oil is designed to be swapped out frequently. The regular Redline synthetics (such as 5W-30)are intended for street use and, as such, should be fine for typical synthetic change intervals. I have been using Redline for years (first time was 1988) and have been very satisfied with every 8000 miles/once per year. My Z is a seasonal car. Last week, before the Saturday night storm in the Northeast, I changed it out prior to going into hibernation. Every two weeks or so (when the streets in my neighborhood permit), I will cruise around for ~30 minutes. This routine has worked for me for a long time. Gets rid of flat spots on the tires and runs long enough to burn off moisture, etc. I have never pulled the engine apart for empirical evidence, but my engines have gone 100k plus with no issues.
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