Review on 🔌 K&N Engine Air Filter: High Performance, Washable, Replacement Filter for Toyota/Citreon/Peugeot Hybrids 2012-2018 (Prius, Corolla Hybrid, Aygo, C-HR, Yaris, Tank, Aqua, C1II, 108) - Model 33-2485 by William Bell

I bought this K&N for a 2014 Prius C (it currently has just over 31,000 miles). MPG: It was bought and installed in 05/2016. I keep very accurate logs of gas consumption per full tank. This filter did not help at all. Not even 1mpg. You can see it has shrunk a bit. My trips are exactly the same. I only use this car for commuting to and from work. Horsepower Boost: While I haven't taken my car to the dyno to check, I doubt there is a horsepower boost. If yes, it is invisible. (A 1hp increase is roughly a 1% increase in a Prius C that can't be matched by anything but the dyno.) Prius Hybrid – from electric motor to internal combustion engine. As other reviewers have pointed out, I also felt that the electric motor transitioned to an internal combustion engine. a little smoother. Bottom Line: Buy this filter if you never want to change a filter in your car life. Also ONLY if you intend to own the car for about 6 years. For the price of this filter you can easily buy 4-5 regular Prius C filters from Revain. For HP and MPG boost - skip it. Rest assured that Toyota made the Prius C very efficient. I've attached my Fuelly charts with last year's monthly data. Here is my link to Fuelly for my Prius C:[.]