Still running without BG products, in the second checkup, we discovered an increase in deposits on the intake valves and ports as well as significant fuel dilution of the engine oil. This can result in a decrease in oil viscosity, which challenges lubrication capabilities of the oil. The presence of fuel in the crankcase also promotes oil breakdown resulting in oil oxidation and acid formation.
Watch the video below and notice the caked deposits as the borescope works its way down the cylinder toward the combustion chamber.
In the photo of an open intake valve in Cylinder #2, notice the deposit formation on the exposed valve stem compared to the part that pulled back into the valve guide when the intake valve is closed.
The BG Fuel Test Car cruised through training in Miami, Florida.