128K miles. Added at oil change. Engine runs much smoother now, better throttle response. I'll use this next oil change!
Great Product. Made a big difference in startup for my Powerstroke.
I notice the most difference at 190 miles I was pulling on a long haul and right before I left I added arch oil at 190 mile the pick up sounded better pull led better ran so much smoother and it got rid of a high pitched squealing noise from the turbo best of all it can in on time with excuse of COVID 19