Took for ever to arrive. That is really the only thing I really didn’t like about the product.
It start easier not as rough on cold starts.
I bought a 04 6.0 about 8 years ago. Not long after during the first cold snap I noticed it ran kinda rough and loud until it warmed up. Not knowing anything about the 6.0 or "stiction" I did a little online research. I watched a YouTube before and after video that showed a cold start with very similar symptoms and then after using Archoil. I checked out Archoil's website, they seemed to present knowledgeable and accurate info about AR9100 so I gave it a try. Stiction was gone within 50 miles and has never returned. I use AR9100 once or twice a year just for maintenance. Great product. Seems like it took USPS forever to deliver it though.
I have used this archoil for years now for stiction and I LOVE IT. Best stuff ever for the 6.0 or 7.3 powerstroke engines. Great Stuff.
I added this when changing my oil and within 50 miles my 2000 7.3 started easier and faster, my injectors are quieter and ive gained 3mpg. Im a firm believer in archoil 🙌