I got some Auto-Rx back when it was set up with 500 miles for cleaning and like 1000/1500 miles for rinsing.My 95 Lincoln Town Car has 146,672 miles on it now.Here's what I did:
Started at 133,738 with Chevron Supreme and 12 oz Arx.Drove 637 miles.
Changed at 134,365 just rinse Chevron.Drove...