Originally Posted By: Hollow
Originally Posted By: GaleHawkins
Thanks for the update. Was it still clear like when you drained it?
Darker than I expected, but the car looks like it may have missed an oil change or two. I'll probably be doing a few shorter 3-5K OCI's with PYB or PHM and then go to a longer OCI with QSUD or some such.
Sounds like a few shorter OCI's would be good prevention. Used vehicles often have dirty engines I find.
Last year for the daughter we picked up a 2007 Dodge Dakota with the 3.7L V6 but only 62K miles with very dark oil that had been changed 200 miles earlier per the Chevy dealership. They had put xW-30 in it they said. We went back to 5W-20 after about 500 miles and now after about 15K miles of 3K mile changes it is staying more clear longer.
For the son it was a 2002 Dodge Ram 1500 with the old 5.9L gas engine with 110K miles. It still is getting dirty faster than I would like but the oil usage has really declined for some reason. We plan to keep both on 3K mile OCI's for a while.
Last month for myself I picked up a 2006 Ford 500 car with the 3.0L V6. It was the wife of a Ford car salesman with Ford dealership oil changes every 5K per the retired Ford salesman himself. The engine looked very clean when looking down the oil fill opening with just a little orange/brown stain on the aluminum. I just checked this afternoon and that stain seems to be going away. It is still Ford serviced with MC oil and filter per Ford specs but it has Archoil AR9100 in it for the last 3K miles. We changed it at 4K miles (after adding 500 miles) and have 2500 miles on this new OCI and the oil is still clear.
My take away at age 65 on my first 'old used car' that has been dealer serviced since day one is doing OCI by the factory specs leads to very clean engines 10 years/110K miles down the road.
While I do not think the AR9100 was really needed I just want to see what it would do on a 'clean' engine. It did clean up the 4.6L in the 2000 Towncar even more but we got it 100K miles/10 years ago with a very dirty 70K mile engine. It was fairly clean two years ago when we started using AR6100 in all of our gas/diesel engine but looks brighter through the oil filler hole.
Without fail we have been able to internally clean up some very dirty engines with 3K mile OCI's just using factory spec motor oil.
The 1989 Ford 429 in the F700 was the dirtiest engine we have every brought home. I expect the oil filter had gone into full bypass mode. Rotella T6 5W-40 is what we use in it. It does not get used very much but after about 3 filter only changes the oil cleared up in the first 1000 miles. After 4 years we changed it again because it was black again.
I grew up as a poor farm kid but Dad was the first person that I knew to use high detergent oil (Standard Supreme 10W-30) in a new 1962 Ford 801 Power Master tractor. We rebuilt it a couple times over the years due to high hours but it NEVER was dirty on the inside. There was a discussion at the dealership if high detergent oil would harm the new tractor engine but in the end they said it was OK so that was all that tractor saw for the next 30 years. The oil and filter was changed every 100 hours where it needed it or not.