Chevron Techron 12 oz. Fuel System Cleaner (2 Pack)

Been using this for 2 vehicles for years and it really makes a difference with smoothness and mechanic tells me it keeps carbon down on valves cleaning them gently when driving with the newer engines designs and gas with the ethanol. Even the tailpipes are clean and not sooted up like most cars have. I use every oil change 5K miles.

The performance of my car improved within 5 minutes of adding this engine cleaner! Be sure to add it when the gas level is low to get the most out of the product. The neck on the bottle is long, so it is easy to add to the gas tank. Great price for what you get. I highly recommend.

Great product

This has been recommended by many people. I use it and assume it keeps engine running smoothly. Only only issue. I have a capless fuel system. The top of the spout can get caught when pouring into tank. I cut part of the spout off before using this.

Really good

I believe these help keep my car running well. I use one every couple of months to help keep things clean in my engine and gas tank. My car has 300,000 miles on it and still runs great. But you do have to maintain your car with oil changes and stuff or it's not going to end well. ;-)

Worked very well with my again

I was told to use this fuel system additive by my Mercedes dealer once a year or every 10k miles to keep the fuel system from gunking up. I follow that along with using top-tier premium gasoline. That combination has resulted in 70k miles of zero maintenance issues. Kinda pricy for what it is but so much less then the cost of a fuel system cleanout by the dealer.