Any use this. They say it real helps clean the injectors. I just got a bottle for around 6 dollars. I'm going to put it in on my next fillup.

 

In the good old days, you couldn't get a bimmer to idle smoothly for more than about a week without using the BMW gas additive. I treid all the other additives to keep from going back to the dealer, including Techron, but none worked as well as the bimmer additive. Then I found Red Line. It worked just as well as the BMW additive and was much cheaper. After you put a full bottle in, you only put enough in for the amount of gas you are adding (bottle is marked in 10 gal increments). Every couple of months, run a whole bottle through. After surviving one BMW "campaign" after another decarbonizing my engine I became a believer. I use it to this day. I have obviously heard that Techron is good but there are several of those and only one is the high power concentration and I have never had much luck with the dilute ones. I have recommended the Red Line additive to several people, last one was a Mustang Cobra running rough and the Red Line smoothed it right out, and had very good results. BMW brainwashed me that the gas we get is just not as good as in Europe (may or may not be true) but I consistently use Red Line in both mine and my wife's car.