These harmonic intervals are the same ones used in Western harmony for major and minor chords. So, up to this point (as theorized by Rameau, for instance), nature and culture seem to coincide. But ...

Once again the chromatic notes make for some interesting harmonic lines and intervals. This scale was famously used by Dick Dale for the melody of his classic instrumental, Miserlou. Our final ...

Generally, there is no set replacement or service interval for the harmonic balancer, but many automotive experts recommend getting the balancer inspected as part of your routine maintenance plan.