Auto-Rx Engine Oil Treatment - PeachParts Mercedes-Benz Forum

Screwdriva · #1 06-30-2019, 03:24 PM

Wanted to contribute to the forum by sharing a bit about my experience using Auto-RX Engine Oil treatment over the past 13+ odd years, across 5 vehicles. I've found that in every motor the following occur, when paired with a 2 bottle Diesel Purge fuel treatment in parallel:

1) Stops or drastically reduced any oil seepage/ wetness from typical spots (crankshaft seal, valve cover seal etc.). Especially true in the OM61X diesels I've treated. Internal visible components actually shine with no sign of sludge.

2) Fuel economy will increase a bit and settle at this higher level of efficiency. Anywhere from 3-7% but never more than this in my cars.

3) Engine hesitation has reduced alot. This is particularly applicable to the petrol M111 motor in my W124.

4) Increased smoothness and quieter idle in the OM617 motor powering my W123 300D. I expect that this result will be replicated in my OM616 motor in my W115 240D.

5) Engine blowby was drastically reduced. My oil cap danced like a ballerina on crack when I purchased my W123 300D. 6 months later after the above treatment, that Ballerina has been sedated to near stillness.

I can't claim increased power because I have no way to observe or measure this other than a very subjective feel. But the butt dyno swears that there's more punch than before.

Finally, W123 specialist Mark Cosovich had high praise after driving the motor (following ARX treatment). In the midst of treatment on my W115 diesel. Will post a before and after vid once complete in 2020.

Sugar Bear · #2 06-30-2019, 06:26 PM

Thank you for the information. Has anyone else on this forum used it and are willing to share their results?

JHZR2 · #3 07-01-2019, 12:34 AM

Quote:

Originally Posted by Sugar Bear

Thank you for the information. Has anyone else on this forum used it and are willing to share their results?

This product was discussed extensively at bobistheoilguy.com. The manufacturer, Frank, used to contribute there. Measurable and observable outcomes, including from valve cover before and after shots, etc., could not be easily or readily proven across large bodies of people.

The chemistry seems legit, but the efficacy and applicability in most automotive engines is questionable.

75Sv1 · #4 07-02-2019, 07:29 AM

I have used it. I think on a few engines. I can't claim results either way.

Maxbumpo · #5 07-02-2019, 11:32 AM

Diesel Purge - yes. Great product.

The benefit of reduction of oil leaks sounds good. Mobil 1 can provide similar results. Seal conditioners at work in both products it sounds like.

I'm skeptical about the rest of the claims, but the major risk seems to be the wallet of the user, so maybe worth a try on an poorly running engine.

Diesel911 · #6 07-02-2019, 01:16 PM

My question is that if I am using 10-20 wt mulitiviscosity oil and I put in an Oil Additive how does it not interfere with the mulitiviscoity of the Oil?

I say that because usually Oil additives are thicker. Raising the Oil viscosity would also decrease leaks and maybe help seal worn rings/cylinders to hold in more combustion.

Diesel911 · #7 07-02-2019, 01:16 PM

My question is that if I am using 10-20 wt mulitiviscosity oil and I put in an Oil Additive how does it not interfere with the mulitiviscoity of the Oil?

I say that because usually Oil additives are thicker. Raising the Oil viscosity would also decrease leaks and maybe help seal worn rings/cylinders to hold in more combustion.

JHZR2 · #8 07-02-2019, 02:40 PM

1) Auto-RX (or any additive) is only a minority component.
2) When dissolved/mixed, the host fluid properties change but only by the weighted average of the two mixed items.
3) Auto-RX is not highly viscous. Oil burn prevention adds tend to be, but cleaners don’t.
4) finished lubricating oils are always mixes of less and more viscous basestocks, various ones having different temperature/shear behaviors to get to the end product.

Auto RX does not clean by solvent action or affect leaks by increasing viscosity. It is more of a surfactant as I recall, utilizing surface chemistry to safely encapsulate and suspend dirt and sludge.

IME diesels, with an oil add pack intrinsically designed to do that don’t tend to sludge or require that type of cleaning.

Diesel911 · #9 07-02-2019, 08:48 PM

None of the vehicles I have owned gasoline or diesel since 1968 have ever developed sludge and that is with no additives.

chronometers · #10 07-03-2019, 10:17 AM

MB specifically states, "no oil oil or fuel additives unless MB approved". Your motor oil, if MB approved, should do the job stand alone.

Avoid additives.

JHZR2 · #11 07-03-2019, 11:28 AM

Quote:

Originally Posted by chronometers

MB specifically states, "no oil oil or fuel additives unless MB approved". Your motor oil, if MB approved, should do the job stand alone.

Avoid additives.

Which is effectively all OBE because the OM 61x and 60x engines have fallen off of the MB Bevo site and oil spec sheets. Meanwhile API and ACEA specs have changed, so more or less any MB approval is irrelevant.

Best bet is a regular SAPS HDEO in an appropriate viscosity per the original documentation.

Diesel911 · #12 07-03-2019, 04:26 PM

Quote:

Originally Posted by chronometers

MB specifically states, "no oil oil or fuel additives unless MB approved". Your motor oil, if MB approved, should do the job stand alone.

Avoid additives.

Unless the Car maker makes additives for their own vehicles they never recommend additives.