My 2016 has 71000 miles on it. When it had @ 20k, it regularly cleared 30 mpg on highway trips, with the best being 32.4. But, I haven't seen 30 mpg in 2 years. Those same trips half-way across the state had dropped to 27 - 27.5.
In preparation for a trip to FLA, I decided to try an intake valve cleaner. I chose an STP product I found at the parts store. Though I'd tried another cleaner at 30k miles, it didn't seem to do much. This time I got good results. The engine seemed to run a little smoother, but more importantly, my fuel mileage improved 2 mpg, or a little more at 65 mph. So, I bought another can and repeated the treatment. After the second treatment I was getting 31.5 mpg on semi-rural highways near home. Cool!
On the trip from TN to the Panhandle I was averaging 33.6 mpg running the speed limit or just under, until I got to the small towns on 2-lane roads near the AL line and finished the trip at 31.2 mpg. I used cruise control as much as possible.
This is the stuff.
It is easy for one person to use. And actually seems to work. Part of the instructions is to drive the car 15 minutes after finishing the treatment. Each time the engine would stumble and miss at some point in the 15 minutes and go into limp mode. Restarting the engine fixed that. Best of all it has restored my fuel mileage to what it was early in its life. I plan to retreat the engine at 30k mile intervals.
In preparation for a trip to FLA, I decided to try an intake valve cleaner. I chose an STP product I found at the parts store. Though I'd tried another cleaner at 30k miles, it didn't seem to do much. This time I got good results. The engine seemed to run a little smoother, but more importantly, my fuel mileage improved 2 mpg, or a little more at 65 mph. So, I bought another can and repeated the treatment. After the second treatment I was getting 31.5 mpg on semi-rural highways near home. Cool!
On the trip from TN to the Panhandle I was averaging 33.6 mpg running the speed limit or just under, until I got to the small towns on 2-lane roads near the AL line and finished the trip at 31.2 mpg. I used cruise control as much as possible.
This is the stuff.
It is easy for one person to use. And actually seems to work. Part of the instructions is to drive the car 15 minutes after finishing the treatment. Each time the engine would stumble and miss at some point in the 15 minutes and go into limp mode. Restarting the engine fixed that. Best of all it has restored my fuel mileage to what it was early in its life. I plan to retreat the engine at 30k mile intervals.