What’s in the fuel you are pumping into your car, truck or machinery? Is there a difference in fuel quality from one station/supplier over another? This little write up may be able to shed some light on these questions. What is the “Top Tier” additive standard and how did it come about? If we go back to 1995 you can find that the EPA defined a level of performance additive requirements within fuels to consumers. According to the Top Tier website they report that since 1995, “most gasoline marketers have actually reduced the concentration level of detergent additive in their gasoline by up to 50%.” This ultimately means that the lack of additives/detergents within your fuel could really be harming your vehicles with issues like engine deposits, low lubricity levels and filter plugging. Since these standards were implemented some of the largest vehicle manufacturers have begun to take notice and adopt a new standard for the fuel being consumed by their engines. The Top Tier movement is coming to fruition and it is beginning to make very large strides, not only within the Tier 2 gasoline engines, but also within the newer Tier 4 diesel engines.