"Seeing this F-350 go from a cold-blooded, rough-running basket case to a truck that ran as smooth as it did the day it left the dealership definitely made believers out of us."
"Archoil is the Real Deal"
The only thing I've found that actually works. Dropped number 3, bought an injector, changed oil and added Archoil. Cleared up and got another year out of it.
We have used this at every oil change since we had our 2005 F350 Bulletproofed. Truck has run great consistently alone and while towing our fifth wheel. Also use the Archoil 6500 diesel treatment at every fill up. Very pleased with these products.
Shipping was quick and I like the way it was packed. My engine seems to run a little smoother. Added some to my Harley to see if it runs cooler. So far it's pretty good.
After using AR9100 in my last oil change, I'm hooked. I'm changing my oil again this week and yes AR9100 is on hand and will be added.
I changed the oil in my '05 Excursion to 5w40 synthetic and added Archoil AR9100 when refilling. I didn't notice any immediate changes as the engine already ran relatively smoothly. That being said, since that first change, the engine has smoothed out even more. The real test will come when we get sub-zero temps again this winter as it was awfully grouchy cold starting back in January before I changed the oil. Overall I would say this is a great product and wished I would have known about it when I had my old '97 7.3L.