Auto-Rx^® is a clean-as-you-drive product. Auto-Rx^® is added to the host motor oil and slowly dissolves contaminants from ring packs, cam lobes, and other high-friction areas. For a comparison of Auto-Rx^® to solvent flushes, CLICK HERE.

Slow methodical cleaning is the desired cleaning mode, unlike old solvent technology that can chunk off contamination deposits (dangerous) and severely impact polymer seal materials. Auto-Rx^® is compatible with all lubricating oils---conventional, Group III, semi-synthetic, and full synthetics. It does not alter the host oil in any way.

We believe you are best served by using a simple conventional oil, but some of you have asked for a list of approved synthetic oils for use with Auto-Rx. While this is not an all inclusive list, the following brands are amply available to suit most needs, and they span most blenders.

     Amsoil: limited to XL line.
     Castrol: Syntech with the exception of 0w-30 imported from Germany
     Shell, Pennzoil, Quaker State: All
     Motor Craft: All
     SuperTech

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.

If you cannot find the proper spec conventional motor oil, we suggest running a Group III synthetic oil, which is merely ultra-refined conventional oil.

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^® extended performance dose 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.

Auto-Rx^® is made up of three ester groups. The lanolin ester is the main cleaning agent; its function is to impregnate the surface of varnish and coked-up deposits. The second is an aliphatic ester; its function is to provide better film forming of the host oil, eliminating the potential of dry spots in the oiling system during the cleaning process. This component is also very resistant to oxidation and is a supplement to the host oil while the contamination is being removed and deposited to the filtration media. The last ester is a biodegradable, polyol ester, which provides extra, extreme pressure capability to the host oil. Utilizing heat, pressure, and flow, generated within the oiling system, Auto-Rx^® safely and effectively dissolves deposits. Deposits form slowly over time. They should be cleaned slowly and methodically, as well.

The combination of esters provide polarity to the host oil, giving the lubricant an attraction to metal surfaces, reclaiming these surfaces from the contamination. Lubricating oils perform well in clean working conditions. Lubricating oils can either lubricate or clean, but they cannot do both well. Detergents are added to motor oils to try and maintain a clean system. They do little or nothing on deposits that have already formed.

Auto-Rx^® is designed to safely turn back the clock on contamination in the lubrication system, and periodic use of Auto-Rx^® will reduce wear and maintain peak performance by keeping a clean oiling system.

Bottom line---If your engine has "special" needs, email us with a description. We will try to come up with a working application. (This would apply primarily to synthetic oil users.)