Another Auto Rx Question

[Spooner]

Why did the AutoRX cleaning mileage go from 500 to 1500??? I understand it used to recommend 500 miles cleaning and now it says 1500, just curious. Was it because it is reformulated or just better results with more miles?

 

[Bio-T]

Auto-Rx is trying to simplify the instructions. Some vehicles responded better at the 1500 mile mark, so the decision was to use that as the mileage for all vehicles. Same formula.

 

[Spector]

My two cents. I think that they also assumed most people would be using a dino oil for the cleaning cycle and realized that if a synthetic was used it took much longer to do the job. Back then also there was no rinse cycle (dino mandated in this phase) and I think they realized that (like the manufacturers recommendeding 3000 mile oil changes) better to play it safe and do the job then have complaints about it not working.