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Auto-Rx Worldwide, Inc., sells only one product and that product is Auto-Rx® Plus. If it does not say Auto-Rx® (look for the hyphen), it is not our product.

Auto-Rx® Plus is compatible with all 4-stroke motor oils both conventional and synthetic.

greenchemistryGot a problem with an engine, transmission, power steering unit, or differential? Got a rear main seal leak? Use Auto-Rx® Plus and get proven results!


Read this link to see how we saved a customer $3,000!

Featured Testimonial
Aloha Frank,

Just letting you know that I think you have a great product. I found out about it via youtube.

I have a 2001 Toyota Sienna with 225,000 miles. The oil has been changed every 3-5000 miles and it started running rough with a P1354 code. Thinking that it was the oil control valve, I replaced it and still had the same problem. After seeing the video on youtube, I decided to give your product a try. I added 2 bottles to the existing oil ( the existing oil had about 1500 miles on it ), have driven it about 500 miles so far, and the misfire has stopped and the check engine light went out without having to be cleared with a scan tool. Looking back I had also noticed a gradual loss of power when going up hill, no misfire, just not as strong as it used to be. This may have been the start of the VVT system being affected by sludge/varnish build up that Toyota’s are prone to. The power is also getting back to normal since using your product. Amazing!

Once again mahalo for a great product, and I will let my friends know about it as well…

Hi Frank,

Just wanted to let you know you saved me $3000.00. My transmission was sticking in 3rd and 4th gears and an reliable transmission expert advised me to replace the trans with a rebuilt one. I found your product on the internet and put all 12oz in the trans and had immediate good results. I have driven less than 300 miles and the problem has disappeared.I am truely impressed.

Thank you


Auto-Rx Plus is not an additive. Think of Auto-Rx as one thing and your oil as another. Your oil lubricates. Auto-Rx cleans. The primary purpose of oil is to lubricate. Auto-Rx has only one job—to clean.

This is sludge. This is in your engine.

There is only so much “room” in oil. Oil companies have experimented with various detergent/cleaner combinations in oil and have been able to take the cleaning only so far. For long-term equipment operation, they cannot take it far enough. That is where Auto-Rx has its important role.

Auto-Rx is not applied to “cure” some deficiency in the oil. Oil is not deficient. However, because we have to stay within the laws of physics and chemistry, oil cannot do much more than marginal cleaning if it is to do its primary duty, which is to lubricate.

You need oil in your equipment permanently. You need Auto-Rx temporarily (though some people leave it in their oil all the time with no problem). When you pour Auto-Rx into your oil reservoir, it mixes with the host oil. The oil carries Auto-Rx through the lubrication system. As Auto-Rx encounters abrasives, dirt, and grime, it dissolves that harmful stuff. And it causes the junk to coagulate into clumps too small to clog any passageways, but large enough to filter out.

That’s how it works. Auto-Rx is not a solvent, a friction reducer, an oil enhancer, or another magic potion, although these may be side benefits. You add Auto-Rx separately. It does not change the properties of your host oil. It is safe, green chemistry applied on a periodic basis as part of a common-sense extended protection program.

Auto-Rx® Worldwide, Inc. wants everyone to have a good experience with Auto-Rx® Plus. Unfortunately, some wait too long before they give Auto-Rx® a try.

Engines must have proper lubrication to survive which means Auto-Rx® Plus can only clean if it can reach areas that have contaminant build up. Oil return lines in the cylinder heads must not be restricted and oil pump pick-up screens can’t be blocked.

There have been instances when we’ve advised potential customers not to buy our product because it’s simply too late for Auto-Rx® Plus to help. The best advise we can give at that point is to have a mechanic repair or replace their engine. Auto-Rx® Plus should not be thought of as a last resort. If it is the last resort, you have simply waited too long for Auto-Rx® Plus to help.

There are several things you can do to prolong the life of your engine. Proper oil and filter changes are a must but good maintenance doesn’t just stop there. Routine servicing of your PCV and cooling system is also highly recommended.

How to easily increase efficiency in your car engine

The same is true for oil filters. You typically only get what you pay for.

Learn more

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