Auto-Rx Customers Questions & Answers

Auto-Rx^® works with generally the least expensive motor oil available. Conventional engine oils includeValvoline Conventional, SuperTech (available at Wal-Mart), and Coastal (available at AutoZone). Group III oils, such as Pennzoil (in the yellow bottle), Pennzoil Platinum, and Castrol GTX, work well also. (See chart below)

Use of high-mileage or synthetic engine oils should be avoided during the Auto-Rx^® application. However, high-mileage engine oils can be used while following the Auto-Rx^®maintenance program.

If your engine has a supercharger or turbocharger, or if the manufacturer recommends that you use only synthetic motor oil, please choose a Group III motor oil to avoid competing chemistries. Always choose the engine oil weight (viscosity) that your engine manufacturer recommends.

We believe you are best served by using a simple conventional oil, but for those who must use synthetics, here is a list of synthetic oils approvedfor use with Auto-Rx^®. While this is not an all inclusive list, the following brands are amply available to suit most needs.

Technical Talk About Motor Oil

Simple, conventional mineral oil works best for the cleaning and rinse phases of Auto-Rx®. With conventional motor oil, there are no polar ingredients attracting oil to metal surfaces. This is important in facilitating the release of dissolved contaminants to be carried away by the host motor oil. With a recommended 2500-mile run for cleaning with Auto-Rx^® installed, and an important 3000-mile rinse phase, running conventional oil for these relatively short oil-change intervals will also save you money. Whenever possible, utilizing this recommendation will maximize the effectiveness of your Auto-Rx^®cleaning application.

The engine protection offered by conventional oil over a 3000-mile oil-change interval is equal to a more costly full synthetic. Motors that are specified for synthetic oils only have a corresponding long drain interval of 5,000 to 10,000 miles.

The use of a conventional mineral oil is essential in addressing seal leak issues. Auto-Rx^®cleans deposits from beneath rotational seals, causing no swelling or degradation to the polymer seal material. Auto-Rx^® can effectively slow, or stop, rotational seal leaks.

Once your motor has been cleaned and rinsed, the Auto-Rx® maintenance program works extremely well with any motor oil. In conventional oils, additional cleansing will occur, as well as providing supplemental lubricity and neutralizing acidic formations. In synthetics, the maintenance dose supports a healthy TBN (total base number) and has shown to reduce wear on metals.