Hello everyone I just started my auto rx sludge application in my 2000 dodge intrepid. I bought mobil 1 synthetic, which I was told is a group III oil, (or a highly manufactured group II oil) so I decided to run it during both sludge and cleaning phases. While driving the car into town my oil light started coming on and would go off and on when I excelarate. This has never happened to my car before so do I have to worry? My last dodge intrepid had this issue with low oil pressure and the oil light would do the same thing. This car has about 36,000 miles on it. Please give me some feedback a.s.a.p I would really appreciate it. Note: before I ran this new oil with auto rx I was running royal purple in the car, and it ran great.
Pennzoil Platinum would have been a better oil if you had to use synthetic since it is a group III-based oil. Mobil 1 does have group IV and V chemistry, although no one knows how much. For the rinse cycle, you should get better results using a non-synthetic oil, which will work better to release the contaminants from the engine surfaces and get them to the oil filter. A good oil for this is Mobil Clean 5000. You can get 5 quarts of this oil and a decent Purolator filter for $13 right now at Advance Auto, if that helps.
Save the rest of the Mobil 1 for AFTER you have finished cleaning up the inside that engine with ARX. It should do well to KEEP the engine clean at that point, along with a maintenance dose of ARX.
The oil light is an indicator of oil pressure. Your engine needs oil under pressure to lubricate the moving parts. When this light comes on, there is a chance that your engine is running with little or no oil pressure for some reason. However, when Auto-RX gets to work inside a really dirty engine, the oil pressure light can come on and off as contaminants temporarily block this sensor, making their way (eventually) to the oil filter or pan to be drained out later. If your light comes on and STAYS on during this process, and/or the engine becomes noisier than usual, you should look into changing the oil filter early, and possibly even take the oil pressure sensor itself out to make sure it is not plugged with sludge. It needs an open path to the oil supply to get enough oil pressure to turn off the light. If all else fails, get an oil pressure gauge and READ the pressure with the engine running. It should have 10 psi or more at idle, hot.
I like to error on the side of caution, that is why I am saying all this. Auto-Rx is a slow, methodical cleaner and should not release any big chunks like an engine flush could, but rather cleans safely, bit by bit, which is by far the only way to do it right.
-- Edited by bmwtechguy on Friday 18th of September 2009 08:44:38 PM
