****** - Verified Buyer
4.5
EDIT: March 2021. My first review was from October 2019.I was convinced I had injector issues again, 1 specific injector, or suspected harness issues after an issue with a repair a while back. This time it's stuttering/missing when cold, even at higher ambient temps. (North Texas) it'd take 10 minutes to finally clear up enough to accelerate without it feeling like it was about to lay down. This felt different, more pronounced and at any temp, until it was fully warmed up, and even after sitting for an hour or so after being warm.Before looking for someone I can trust to diagnose it (I have a couple of other thing things to do as well) I decided to once again roll the dice and see if RevX would make any difference.This time I cranked the cold truck and backed it out of the garage and while it was idling, I poured 2 bottles into the oil fill tube. Cleaned up, tinkered and within 5 minutes went for a drive. This isn't something I'd ever believe and I'm still perplexed, but there wasn't even 1 miss, it was smooth as can be. It was a short 5 or so miles in 30-50MPH driving, then parked for just over an hour and back home. It's an uphill climb leaving the gym and surprisingly it had the smooth power back. I've been running it stock for quite a while. All the way home, it was just happier, smoother, accelerates better etc. I know this probably sounds like a chintzy paid ad or something but it's not. I order a 4 pack last night because it could be delivered early AM (got it at 5:30AM) so I could get it in the motor so I could decide whether I needed to bring it in to someone. I'm sold. The name always made me think of it as a gimmick, but whatever it is, it cleared the stiction as soon as the oil cycled. I'm going to just add 1 bottle every oil change to keep it healthy. I'll expect my MPG will get may to normal now too.Again, I'm not getting anything for this, no one has asked me to do this, it's just bizarre to me how well it works in my case. If you actually have injector or other issues (FICM) obviously it won't help at all. In my case, it has a rebuilt, slightly hot FICM, and all the 6.0 fixer-up stuff (studs, bullet proofed, Power Max turbo, exhaust etc.)++++++++ ORIGINAL REVIEWI've had my Excursion with 6.0 since new. A few years ago I started having cold start issues and while I've never really subscribed to additives, I gave Hot Shot Secret a try. By the 2nd day cold starts cleaned right up and the truck actually ran even better.Fast forward to this year. Not really any cold start issues, but definitely what I'd call stuttering until the oil temp came up. It seemed like injector issues based on how it started, ran cold but even noticed subtle stuttering/missing at consistent hwy speed. I noticed it was smoky also, as if it wasn't making enough boost for the fuel.In March I tried HSS again although this was different from the first time. Not really any changes, so I was preparing for injectors. Last week I figured $75 was worth a long shot try with RevX, and it was time for an oil change. I kid you not, after getting done, running it to get everything circulated, I took a drive and want able to find the stutter. The next day, same thing. Being cautious, I gave it another couple days and I can't deny, the stuttering was gone, completely. Starts were smoother and no smoke, even under quick acceleration where at least a little swoft of smoke would be normal. It's idling smoother, running cleaner, smoother power and mpg are back where they should be.To ad, I run a tuner, written right and specific to the changes to the truck but also a little more aggressive, to say the least.I think, from my experience, RevX is better for over all injector cleaning. HSS also works but I think it depends on of the actual problem is. I'd absolutely recommend RevX at the first thing to try.FYI, I did this on a whim, expecting to be replacing injectors, so I'm thrilled how well the truck is running now. It's better all around which is to be expected when contribution is so out of whack. Now way can the truck run right with such a difference injector performance. This is obviously critical with turbo diesel.
