- Apr 3, 2008
- Raleigh NC
So, I had been using a generic gas, mostly Hess and Speedway for many years because of the reward points. I notice that on the car, Mazda GDI turbo that I had to run FI cleaner through it about every 6 months because I noticed a rough idle and slight hesitation. After a couple of tanks with the cleaner all back to normal. Then a couple of years ago I got a new truck, Chevy GDI and got better fuel rewards at a station that had Top Tier fuels. I took both the car and the new truck there and have not needed to add any FI cleaner, it’s been almost two years. Both vehicles, Mazda 196K and the Chevy 18K run great and have not noticed a rough idle or hesitation or any other symptoms of slightly clogged injectors. They both run great. So, I do believe that the Top Tier fuels work as intended. I will continue to use them. Anybody else?