I also saw fewer regenerations in the DPF with Elin Crystal on a 500 km trip and I burned slightly less compared to BP Ultimate fuel without the additive on the exact same route with the same speeds, ambient temperature, and car load.

I have been using it preventively for a year on Opel Corsa E 1.3 cDTI 95HP with a program at 120HP and I put a small bottle every four months, following the "tradition" of the previous owner of the car, after his recommendation.

The truth is that while I have heard about problems with injectors in multijet engines and indeed a Panda we have in the family had an issue at ~140,000km, with a costly replacement, the little Opel after 170,000km has not needed anything in the injection system!

At the same time, when the intake/exhaust was solved for turbo cleaning at 160,000km, the mechanic saw the EGR valve spotless and asked me if it had been cleaned before. He was surprised when I answered negatively, because it had minimal deposits and smoke.

Amazing results, in three different diesel vehicles that I recently used it on (799cc with 240,000 km, 1248cc with 175,000 km and 1598cc with 251,000 km). It needs to be driven for an hour at over 3,000 rpm, so combined with a trip on the highway, it works wonders in half an hour!!!

Fast ride and in 10 days you see results. Possibly a second one with an intermediate reservoir of reinforced octanes without a cleaner may be needed.

Whatever chemical you put in the engine after 150,000 kilometers is definitely good, especially if it is Euro 5 and below.

I put it in a Renault Megane 11'... there are no personal differences in fuel consumption or engine performance. What is certain is that it only did good to the injection system and extended the engine's life for the future.

Once a year in one fill-up is the best, especially for oils that only work within the city.

I put it in 2 diesel cars of mine (during the annual service), in one (euro 4) for 10 years now, in the other (euro 6D) for 3 years. I never had an issue with injectors and fuel pump. However, I always use V-Power only at a company gas station. I don't know which of all has kept me from any major repairs. No difference in the engine's operation as some other users claim

It does a pretty good job, the car runs smoothly and you can see the difference from the first moment... Once you put the cleaner in a full tank, you need to rev the car a bit to let it smoke a little afterwards. Then you won't have any issues whether you drive steadily or at high speeds. Basically, it does what it promises... I think it's a good choice to install the Wyrth cleaner twice a year

I put it in 1/3 of the fuel tank and filled it up with reinforced, before a trip with several kilometers back and forth, and I let it almost empty. Now, after the next three refills that followed without the additive, I can say that my consumption on the same routes and with the same driving style has indeed decreased. I didn't notice any difference in noise, vibrations, and engine performance, but I didn't have any issues before either.

I conclude that it is difficult to evaluate something that you don't see immediately. At the price I bought it from well-known gas stations with the shell logo, I would say it's not worth it, but at the price I find it here, I will probably use it twice a year for prevention. The cost is not high.

The test was done on a 2016 Peugeot 308.

I used it for my Hyundai i20 2013 model and I bought it to clean the fuel lines and injectors. There is a difference when you use it, but as I was told, the best result is achieved during a trip because you will be driving continuously for a long distance at a high speed of 120 kilometers per hour (something you can't do on an island) and you will have a better cleaning result on the engine injectors due to the many kilometers and continuous speed, and you use it once a year.

I noticed fewer regenerations on the DPF by using the same fuel and making the same 600km trip, and I burned less.

I think I can say that I noticed a difference when I used it. It is difficult to evaluate such products since the fuel you use and, of course, the vehicle play a big role.

I put it in a 2015 Ford Kuga 2.0d with a recent problem due to a clogged EGR valve. The car was running in safe mode. As soon as I filled the tank and took a trip on the national road for 500km, the result was immediate and impressive. After a while, the warning lights turned off, the car was noticeably running better, and it seemed like it unclogged. I have 150,000km and I generally pay attention to where I fuel up, but I can't know the cleanliness of the fuel, as in Greece, fuels are not well-known for their authenticity and quality. I highly recommend it and from the research I did on the internet, I found out that it really does the job. In fact, in two gas stations where I bought it (twice in total), they told me that even though they had other branded products for the same purpose, this one sold more than all the others due to its efficiency. As for those who say they didn't see any difference, the most likely reason is that their engine is in good working condition.

Really difficult to evaluate a product because its benefits cannot be seen immediately. What I have to observe, however, is that the engine runs smoother. I use it in a Yaris d4d 2015 with 185,000 kilometers, every 10,000 kilometers for the last 50,000

From the very first kilometers, you understand the difference!!! Very good product, it makes the engine work smoothly, stops squeaking and works like new!!

I used it on a Nissan Quasqai 1.5diesel with 145,000 km and a problem with one injector. So far, no issues (warning light), waiting...

I tried it because I have a problem with the engine start (it stutters) and I believe it may be due to cleanliness. Although the problem improved only slightly, I have the feeling that the car "pulls" better.

It actually does the job...
With a good fill-up before a trip on the highway with good fuel and of course this one inside, the car performed better.
It opened up, as they say...

I put it in a suzuki grand vitara ddis 1.9 2006. From the first km, the engine works quieter. It probably gives a little acceleration if it increases the revs indeed, but I'm not so interested in that. I want smooth engine operation without warning lights. I will come back for something new.

The rating is approximate because we are not evaluating something tangible, the installation of the add-on does not make our car a "plane" so that we can say "wow", it is something that will be evident in the long run.

Very good, you can see a difference from the beginning when you apply it, especially during startup. Tested on a Citroen DS4 diesel, I use it once a month for a full wash.

Excellent product, a week after I installed it, following the same route every day, fuel consumption dropped from 6.3 to 5.5 liters!
+ It is also very quiet at idle

I don't know what rating I should give you to tell you the truth. I put it in a 2014 Mercedes and I can't say that I saw any difference. That's why I gave it 3 stars. I don't know if it's fair, but as I said, I didn't see any difference. Of course, I don't know what difference I should have seen. My mechanic, of course, has told me that if I want to use any cleaner-enhancer, etc., I should use Wurth. It's one of the best.

I used it preventively on an Opel Corsa C 1.3 CDTI 2004 with 217,000 km (in which I only use Shell V-power Diesel from 180,000 km) by adding the entire content together with filling the tank, and after 200 km that I have done, I did not notice any difference in performance or engine noise. Without being 100% knowledgeable on the subject, it may be that the fact that I also use the diesel stabilizer from Wurth every 3,000 km or so plays a role.

I got it and put one at 20,000 km and one at 40,000 km. I think it helps with the vibrations, I always put it with a full tank.

I put it preventively (without having any apparent problem with the engine) on a 1.5 Dci 90HP, 85000 km. The vibrations mainly decreased at idle and the response at low revs improved. Good, I will buy it again.