Quote:
I can only tell you what my ears hear, and the feel of the seat of my pants when driving.
I never could hear or feel any difference when the FP 3000 was in the tank. Now I have not yet used the FP Plus for diesel yet.
I'm on my second tank of Opti-Lube: To be honest I have the same feeling about this product. I can't tell if the engine is quieter,nor if the idle is any smoother. Nor can i tell any difference when i drive the truck. I guess i just have the peice of mind that putting in the Opti-Lube is better then adding nothing at all. According to Spicers Test Results.
This is JMHO.