It's less about mileage and more fuel quality and driving habits. City/stop and go traffic is going to cause more deposits vs highway driving. Every 3-5k depending on driving habits should be fine.
Exactly correct. Limiting carbon buildup and excess deposits during combustion throughout the vehicles life is the best way to help keep the valves clean. The injector tip is also a large issue in DI engines as it's directly inside the combustion chamber and easily gets covered in carbon causing...
I cant give out much detail due to non-disclosure agreements, unfortunately. What I can say is our chemists work with some larger refineries to innovate top tier fuels and detergent packages and they are all slightly different... different enough that you would tell if you run one from another...
The better the base fuel, the better any additive will work so the 2 would just compliment each other. All top tier fuels are going to have some detergency package to them, the question is how much. Most gasoline companies claiming cleaners add the least amount to be able to claim it, but it...