There are a wide variety of products on the market that will claim to improve engine responsiveness, increase horsepowers, increase efficiency and lower emissions. But what do they consist of and do they actually work? I’ve used a few in the past and have had mixed results. So, we at Car Articles turned to science for the answer and found this brilliant video from Engineering Explained. Nothing like a few facts to help you make a purchasing decision! Enjoy the video and feel free to comment about any additives you use.