I did the first cycle of Auto-Rx Plus, adding 14 quarts of oil in 3000 miles.  Blackstone oil analysis said that the sample I collected when I changed the oil looked very close to unused oil, that couldn’t detect any additives in it, and the additives probably disappeared with the 14 quarts of oil.   
I have a 2002 Toyota Avalon with the 1MZ-FE VVTi V6 & it apparently has so many sludge problems that there are lots of posts on how to solve it.  I discover sludge when I replaced the front valve cover gasket, but the motor is canted back so much that the rear valve cover is virtually impossible to get off, so I skipped it.  Mistake, big.  It’s gone thru nine iterations/part numbers & the most recent is 11201-0A060.  I found a couple of postings about it.  This one on ClubLexus.com has pictures of the latest & greatest & it’s predecessor showing how it’s been improved & a story about a road trip from Atlanta to Salt Lake City with the predecessor & a new PVC valve that went thru 18 quarts of oil  & the return trip with the latest & greatest that used nary a drop.  Of course the old cover was probably clogged & the new one wasn’t, but still, that’s impressive.
So I’ve just replaced the rear valve cover with the latest.  The baffles in the old one were so sludged up that they blocked internal engine airflow to the PCV valve, so my new valve was doing nothing.  
On the plus side, my compression has improved dramatically.
·        1 – 2nd time 190 psi 1st time 205 psi 
·        2 – 2nd time 195 psi 1st time 152 psi dry 185 wet 
·        3 – 2nd time 190 psi 1st time impossible to get to…
·        4 – 2nd time 185 psi 1st time 170 psi dry 195 wet 
·        5 – 2nd time 180 psi 1st time 190 psi
·        6 – 2nd time 185 psi 1st time 188 psi

Big change!  While none were near Toyota’s 218, they all were within 15 of each other & well above Toyota’s 145 minimum.  All the plugs looked fine except for #2, the coal mine canary, which was badly oil fouled.  As it’s on the front bank, I’m seriously considering replacing just its seals.


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



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!




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



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!)



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



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.



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!



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!