The test vehicle is a 1992 Ford Explorer Sport, with a 4.0 liter single overhead cam V-6. Important to note that a cleaning and rinse with Auto-Rx was performed prior to the test.
Next, a short run on Mobil 1SUV/ 5w 30 was performed to establish the norm of this particular motor. This run on Mobil 1 was for only 1434 miles, but was sufficient to point out a couple issues that needed to be corrected. The analysis revealed that fuel dilution was the biggest issue and contributing to high copper readings, from bushing wear. Also, even though the air filter had been changed out only 8000 miles ago dirt ingress was an issue. Prior to starting the Auto-Rx Maintenance dose, with Pennzoil Platinum, new plugs, wires, PCV valve were installed. A new air filter was installed half way through the maintenance dose run which was for 6101 miles.
Despite the tune up parts, the motor still suffers from a fuel dilution problem, although greatly improved. When looking at the numbers bear in mind that the second run with the maintenance dose (3 fluid oz.) was run for a duration of 4.25 times the mileage as compared to the control.
The combination of Pennzoil Platinum and Auto-Rx shows exceptionally low wear metals, with the exception of copper, which is still due to fuel dilution. It is very likely, that the maintenance dose is providing addition protection of the cylinders and bearings. It is also important to note that the additive package of the Pennzoil Platinum is not compromised at all with the Auto-Rx maintenance dose, in fact may be somewhat preserved. Slightly elevated oxidation readings would indicate that the maintenance dose is doing some additional cleaning.
If not for the fuel dilution issue this oil would be very healthy after 6101 miles and would have service life left. Without a doubt Auto-Rx is fully compatible with this Group III synthetic oil
Test was performed to determine effectiveness and compatibility of the maintenance dose of Auto-Rx in an extended oil drain. To view the independent oil analysis test data click here. The test motor first received an Auto-Rx cleaning cycle.Then, to establish a base line for this VW 1.8 liter turbo, it was run for 2000 miles, on Castrol GTX. Next an extended, 6000 mile run, was performed with a three ounce maintenance dose, oil analysis data is in the right hand column.
The baseline data shows a fairly high fuel dilution problem with the test car. This issue was not addressed by the car owner, with the exception of an air filter change 4000 miles into the 6000 mile extended drain. Instead he elected to run the 6000 miles with the maintenance dose installed.
Despite the severely compromised Mobil 1, due to fuel dilution, the wear metals found in the analysis are very respectable in the 6000 mile run. It is very unlikely Mobil 1, or any motor oil for that matter, would have yielded engine wear rates as low as observed. Although very recently cleaned with Auto-Rx, the motor oil was deemed clean or that no deposit formation was likely during the extended drain, with the maintenance dose installed.
Auto-Rx Summary "Saab" Engine Maintenace Dose / Photos In November of 2005, I purchased a 2001 SAAB 9-5 2.3l turbo, a car known to have problems with engine deposits. I knew the risks but figured I'd get lucky. The car had 59,000 miles so it couldn't be that bad, right? Well, upon pulling the valve cover I discovered I had lucked up alright! The engine was decently varnished and hard carbon deposits lined the timing chain side of the engine, along with scattered small clumps of sludgy deposits. After messing with an engine flush, I ordered two bottles of Auto-rx. What can I say, it did some cleaning! I was very skeptical but my oil filters showed it did some good cleaning. Was it a "magic bullet?" No, I still had some deposits after the two cycles. But it cleaned much more than the engine flush I tried and without the associated risks involved in flushing an engine.
Afterward, I did go on to try several other products with a reputation for cleaning and none gave me the level of cleaning that auto-rx had. A certain ester-based synthetic that everyone believed would clean a "dirty" engine did nothing. Two other types of flushes along with another highly regarded additive did nothing. I didn't get a single dirty filter and before/after pics under my valve cover showed no change since my last Auto-rx cycle.
A new maintenance dose that I put in recently reaffirmed Auto-rx's abilities. Several oil changes had passed since my last Auto-rx clean and rinse cycle and none of my filters showed any significant amount of carbon deposits in the pleats upon removal. Yet, after changing out a 4,500 mile run of Pennzoil synthetic with an Auto-rx maintenance dose, I again had a pleasant surprise when I broke open my oil filter. Even with the maintenance dose, Auto-rx was removing deposits.
As for my SAAB, well, I've put more than 40,000 miles on it since I bought it and it has yet to develop any deposit-related problems! I'll keep everyone posted as I will run the maintenance dose from here on out!
Thanks for consolidating the maintanance plan techical info. Together with the new pricing for multiple bottles makes using the maintenance dose, very affordable. A real no brainer.
What most folks forget about is doing the transmission cleaning dose prior to having the fluid exchanged. The tranny is the weak link in many automobiles due to lack of fresh fluid. In an automatic normal fluid exchange should be every 30,000 miles. But most people don't get it done. If you have gone over or well over the normal extended drain in the transmission. Do yourself a favor and run the cleaning dose in the trans for 1000 miles before you have it purged. Don't let the trans be the weak link due to neglect. If that means buying an extra bottle of ARX, when considering your motor, do it. The transmission will take a half bottle and have a couple or three maintanance dosed left for the motor. This is the real no brainer.
Frank, I just bought a 2007 Saab 95 and I'm concerned about sludge, but I've heard they fixed that issue by 2005. Any thoughts on that?
Even so, I'd like to do an ARx clean-out but first I gotta figure out why I'm losing a 1/2 quart of oil every 200 miles. It seems to be coming out the filler tube, but again, Saab said they fixed that by 2003. I don't think so. I routinely have liquid oil on the flange right below my oil cap. And my driveway looks like it's in a rain forest of oil. What's your experience been with your 9-5 leaking oil?
Also, I read that the Cat Converter generates so much heat close to the sump that it tends to cook the oil, making it smoke out the filler tube and scale up in the pan. Anything?
Thanks Frank. I don't know about your 2003 model, but Autozone doesn't show a PCV valve for 2007, and the Haines manual only shows an oil trap on the block. That's why over-pressure in the sump makes no sense to me.