How many miles do I need to drive before I see results?

There are a number of factors that affect real world fuel economy: weather conditions, driving conditions, driving habits, etc.  Also, most trucks and cars are equipped with Vehicle Control Modules.  These modules are constantly taking in information from a variety of sources.  The computers need to be reset over a period of hundreds of miles and even a couple of tanks of fuel.

You will see immediate emissions reductions and may feel a slight power increase due to the DieselMaxx/GasMaxx providing a better grade of fuel to the engine.