Heavy Sludge & Heavy Oil Burning

Automobile manufactures continue to extend out the oil change intervals of their vehicles. A large percentage of new vehicles now come with oil life monitors which help the owner determine when the next oil change is necessary.

Extended oil change intervals conserve resources but have a potential downside. Vehicle owners have come to rely on the vehicle’s dash display to tell them everything they need to know. Few are checking their fluid levels between routine service.

In time failure to track oil consumption and monitor that service intervals are adequate can result in a engine with an excessive build up of sludge or other harmful contaminants.  Auto-Rx® Plus is engineered for gentle yet effective Engine Sludge Removal.

© 2014-2020 Auto-Rx® Worldwide, Inc

Engine Sludge Removal

♦ Restore lost compression ♦ Eliminate engine noises ♦ Stop seal leaks ♦

Restore transmission operation

♦ Improve shifting ♦ Add life to your transmission ♦

Stop power steering leaks

♦ Improve shifting ♦ Add life to your transmission ♦


Auto Maintenance FAQs

  • How many times do I need to apply Auto-Rx® Plus?
    We have seen customers get extraordinary results after only one application of Auto-Rx® Plus. One application is all that is needed. The exception is sludge-prone engines. Sludge prone engines have manufacturer design problems that leave them vulnerable. Using a maintenance does of Auto-Rx® Plus with each oil change will give you added security that a second cleaning will not be needed. If you’ve experienced sludge in the past, it is important to understand why it occurred and then take steps to prevent it in the future. Servicing the PCV system on a regular basis is one way to be proactive when it comes to sludge prevention.
  • What is the Auto-Rx® Plus Maintenance Plan?
    The maintenance plan is our Extended Performance Program. It is your assurance that the gains you received from your application will continue. Left unchecked, contaminants and sludge will return. For most engines a maintenance dose of 3 ounces with each oil change will maintain the benefits you received from your Auto-Rx® Plus application. For those engines that are prone to sludge, you should use 4 ounces as your maintenance dose. After a full cleaning has been completed, then you can maintain your engine on just the maintenance dose in the future.
  • Is Auto-Rx the same as those solvent flushes found at the auto parts shop?
    NO! The solvent flushes that you find in the auto parts store use powerful solvents that can be destructive to your engine and seals. These products are “shock solvents.” They can only be kept in the engine a short time and have a tendency to break off large chunks of sludge that can get trapped in the engine oil passages. Clogged oil passages can cause engine failure. Oil is also negatively affected by the introduction of a solvent; it changes the chemistry of the oil, whereas Auto-Rx® Plus does not. Auto-Rx® Plus works slowly, methodically, and efficiently and will take approximately 2,000 miles to do its job. Engine deposits are formed layer by layer; they should be removed layer by layer. Auto-Rx® Plus does exactly that.
  • When is the Auto-Rx Plus treatment fully completed?
    After you drain your oil and Auto-Rx® Plus mixture, the fresh oil will rinse away any remaining residue from internal engine surfaces. Although engine benefits have already taken place, it will take another 1,000 miles or so (2,500 miles on a diesel engine) to fully remove the residue, and it will be gone after your next regular oil change. Depending on the amount of contaminants removed, your oil may be very dark after this rinse.
  • What about the PCV valve? Do I need to replace it?
    PCV stands for positive crankcase ventilation. The purpose of a PCV system is to re-direct blow-by gasses back into the combustion chamber, not allowing them to escape directly into the atmosphere. Some engine designs allow for a simple system, while others are quite complex containing many check valves and hoses. PCV systems should be serviced on a regular basis, especially on engines that are prone to experiencing sludge. A clogged or improperly working PCV system can lead to contamination of motor oil and eventually sludge build up. The makers of Auto-Rx® Plus suggest you always replace the PCV valve (if so equipped) from the original engine manufacturer. OEM PCV valves are engineered for proper flow characteristics; after-market valves may not meet the same specifications.



For Normal Engine Cleaning


Add 1 full, 12 fluid ounce bottle of Auto-Rx® Plus, as part of a fresh oil change, with a new filter installed.


For all oils treated with Auto-Rx® Plus, drive 3,000 Miles. For Full Synthetic Oil treated with Auto-Rx® Plus, drive 4,000 Miles.

For Engine Sludge


Add 2 full, 12 fluid ounce bottles of Auto-Rx® Plus, as part of a fresh oil change, with a new filter installed.


For all oils treated with Auto-Rx® Plus, drive 3,000 Miles. For Full Synthetic Oil treated with Auto-Rx® Plus, drive 4,000 Miles.



⭐⭐⭐⭐⭐ - Auto-Rx Plus is amazing! I have used it on my 2004 Volkswagon GTI 1.8L turbo because of oil pressure issues and it has made a big difference. As many of you VW enthusiasts know, oil pressure issues due to sludge, it's a real pain in the butt. This product has made a huge difference in my car, and it has definitely saved me tons of money and repairs. I would recommend this product to anyone that wants a clean engine. #autorx

Fernando Trejo - Oil Pressure Difficulties Fixed

⭐⭐⭐⭐⭐ - Auto-Rx Plus is Boss in Audi Transmission The car is a 1993 Audi 100 CS quattro with a ZF automatic transmission. The odometer showed 227,000; past maintenance history not known. The engine would rev a few hundred rpm on the 3-4 upshift when at operating temperature. I changed the fluid and filter; it did not help. I installed Lucas transmission fix (you know, that stuff is at thick as STP); that did not help. I installed 6 oz Auto-Rx Plus. That not only helped, but it completely corrected the problem...and only after a few hundred miles! Furthermore, the upshifts, which were a bit soft, are now quite firm. I drove 1,300 miles, then dropped the pan and changed the filter again. Things looked very clean in there with barely a hint of fuzz on the magnet. The fluid looked like new. I'll perform a drain and fill a couple times just to ensure any bad stuff that may be in there is mostly gone. Nearly 3,000 miles have elapsed since I treated the tranny to Auto-Rx Plus and it continues to run strong. So far, this stuff has worked every time I have tried it!

Thanks Auto-Rx! - Needed Help with Transmission

​ ⭐⭐⭐⭐⭐ - Just wanted to say that my 2.7 liter Sebring has never worked so good with only running Auto-Rx for 2500 kms...a very noticeable difference in power and it idles like a new car. I am a believer!

- Decrease in power issues and Idle Issues Fixed

⭐⭐⭐⭐⭐ - A bottle of Auto-Rx Plus is much cheaper than replacing a power steering rack. I did the power steering application on my El Camino and my power steering works effortlessly. I have 367,000 miles on the car, and it's the original power steering gear. Auto-Rx Plus will keep the seals in your Rack & Pinion steering very pliable. I do not believe in power steering cleaners from BG and other companies that you put in for 10 minutes and then flush. Many of these cleaners have solvents that can do more harm than good.

Brent Olsen - Used Auto-RX Plus in Power Steering

⭐⭐⭐⭐⭐ - I added Auto-Rx to my 1993 Volvo 245 about 6 weeks ago after reading some great reviews online. I had tuned up the engine to smooth out a "shaky" idle situation. The idle situation was much better. However, another serious issue popped up. A 1 to 5 second grinding noise deep in the engine upon start up! After much analysis I realized oil-starved bearings or rings were probably to blame. I added the Auto-Rx, and within a few days the noise diminished. After 2 weeks the noise vanished completely! Just amazing! I rarely write reviews, but I feel like the Auto-Rx guys just saved me $1000! #autorx Thanks!

Johnny G. - Engine Noise Issues Fixed

⭐⭐⭐⭐⭐ - I used Auto-Rx to slow oil consumption on my 250,000 mile Toyota and it has cut the consumption by 400% so far and I am just starting the 2nd treatment. It has also given the engine lots more power. I plan to use it from now on in all my cars. Auto-Rx is the greatest stuff I have ever added to an engine. Try it and you will like it!!!

(Big Grin!) - Used Auto-RX Plus to Slow Oil Consumption

⭐⭐⭐⭐⭐ - My car is a 2004 Audi A8 4.2L 40v V8 with 125k and a good maintenance history. The engine would clatter lightly and briefly upon cold start-up... something that I was not terribly concerned about. I suspect valve train noise. I used Auto-Rx Plus and it is now 300 miles into the rinse phase and I just noticed the other day that this start-up clatter has completely disappeared! ARX Plus is great stuff!

Mike - Needed Help with Engine Noise

⭐⭐⭐⭐⭐ - I used this in my transmission. The service light came on. Frank put Auto Rx in my car and 4 days later the light went off. It is still off a year later.

Nansenia Dycus - Used Auto-RX due to Transmission Issues