Auto-Rx Customers Questions & Answers

brent olsen · Senior Member

2003 GMC Sierra

ranger_dood · Member

I wonder how ARx effects OLM's?

brent olsen · Senior Member

That's what I am wondering too and my friend hopes that after the Clean and Rinse Phases are over he can get more miles out of an oil change. My thinking is that if you have some junk in your engine it will get the oil dirty quicker, just my thoughts. I am not 100% sure how OLM's work but I have heard that they work well in determining when the oil is done. In my opinion the cleaner an engine is the more miles you can go before an oil change.

ilikemycivic · Newbie

ranger_dood wrote:
I wonder how ARx effects OLM's?

According to Honda, their OLM is determined by an internal algorithm, which considers the engine starting temperature, driving distance and engine RPM. The onboard computer also judges your driving conditions and habits, and then calculates the remaining engine oil life, displaying it as a percentage.

No OLM actually samples the oil and gives a reading. It makes an educated guess, therefore Auto-RX would have no effect on it.

brent olsen · Senior Member

I am happy to report that my friend is now 900 miles into the Clean Phase and he says his truck is running smoother and has more power.

brent olsen · Senior Member

I am happy to report again that my friend is 1300 miles into the Clean Phase and is noticing that his engine with 86,000 miles now has almost as much power as it did at 36,000 miles, his results should be interesting after the Rinse Phase gets done.

brent olsen · Senior Member

My friend came over and we changed his oil, it was at the 2700 mile mark, the oil was very dark and the oil filter after it was drained had some weight too it. Ironically his oil life monitor read almost 70%, normally by this time it is between 50% and 60%, he comments that the truck keeps running better and better. We will see how things go during the rinse phase and what the oil and filter look like after 3000 miles.

Richone · Senior Member

If you really want to try an run extended drain intervals like the 6500 miles on the 03 GMC, first get the motor cleaned out with a cleaning and rinse. Afterall this is an especially long oil change interval for dino. If he uses the truck for hauling loads or trailoring then it is likely way to long. Each time you change the oil the minimal detergent/dispersant package in the motor oil gets depleted real fast because it working on deposits left behind from the previous oil changes.

So step one is to clean and rinse the motor. Then run a maintenance dose with each oil change. Once cleaned, I would think 4500 miles is a good number with an inexpensive mineral oil(dino) with a three ounce maintenace dose would perform real well. If you want to run 6500 mile OCI's then run a group III with a maintenance dose in confidence.

brent olsen · Senior Member

He does not use the truck for any trailoring or heavy loads, but it is a 4-wheel drive. He is about 800 miles into the rinse phase and has reported that the oil pressure gauge is moving around, maybe some junk was on his oil pressure sensor and it is getting rinsed off. He is now saying when he hits the gas there is a momentary lull in power and then it takes off, but the truck has 87,000 miles and the spark plugs are original so it may be time for a change. I think his manual says to change the plugs at 100,000 miles. I will also have to get him to change his PCV.

brent olsen · Senior Member

My friend is 2000 miles into the Rinse Phase and is so happy with the way his vehicle is running that he plans to do Auto-Rx in his transmission too.

Panthermike · Veteran Member

Glad to hear, did he do a tuneup yet?

brent olsen · Senior Member

Panthermike, he has not done a tuneup yet. I think he wants to change the oil 1st and see how things go, its his car and I told him whenever he is ready we can change his spark plugs.

brent olsen · Senior Member

We dumped the rinse oil today, it was dark, and the oil filter was heavy with junk. I have observed this before, when we poured in the new oil we could here it trickling down into the oil pan.

My friend says the car is running great, at 3000 miles his OLM was at 40%, so we know Auto-Rx did a serious job of rinsing the junk to the oil filter. He plans on running his dino oil another 3000 miles and then he will go onto the Maintenance Dose.