Yes my truck actually passed its emissions test, and best of all it easily passed them, stomped them into the ground, and burned rubber over the top of them as it drove away. I was impressed, and relieved, to say the least.
The law says that at 60 mph your diesel can have as much as 35% opacity and still be legal. I had 04% opacity which means that I may not have to worry next year as much as I worried this year about passing my test. This takes a lot of stress off of me not only now but in the future, and will contribute bigley to my sense of freedom.
There is one little thing though. For the last few months I've been using some additives in my fuel that are supposed to help clean my fuel injectors and my exhaust system including my diesel particulate filter, "DPF". The DPF is a big deal and is a very common cause of the engine throwing a code which will cause an immediate fail of your emission test, or clogging up to the point you fail the soot emissions. And that DPF can cost a couple thousand dollars to replace or almost $1000 to clean.
So the question is, are the additives I used responsible for my most excellent passing grade, or would it have done just as well without the "snake oil"? And unfortunately the answer is... I don't know. Which means that I don't want to take a chance so I will have to add those two additives to my fuel next spring just to be sure.
Now that there's a chance that the additives may have worked I feel it's okay to give you the names, with the caveat that they may have worked or they may not have, but at least they did no harm. The first one is Archoil AR 6200, and I bought it off of Amazon. The other one is Lucas Deep Clean which you can buy at most auto parts stores, and is designed specifically to clean the carbon out of your DPF.
Like I've said in the past I consider most oil and fuel additives to be snake oil. Because to my way of thinking if they work so well, made your engine run so much better, and last so much longer, it seems like the manufacturer would tell you to put it in there so they wouldn't have to pay for repair work while your engines under warranty.
So I don't know what did it, but since the additives demonstrably did no harm. I will again burn several tanks of fuel with the additives in it before my truck gets inspected again next year.