While it is true, as some have argued here, that all fuels must meet federal standards for detergent additives …..."AAA is urging drivers to switch to a type of gas that costs an extra* 3 cents per gallon on average — Top Tier detergent gasoline.
This announcement follows the nonprofit having various brands of Top Tier and non-Top Tier gas tested by an independent engine testing lab.
After 4,000 miles of simulated driving,
the non-Top Tier brands caused 19 times more engine deposits than Top Tier brands, which contain more detergent additives than is required by the federal government’s standards.
According to AAA, those carbon deposits can:
Reduce fuel economy
Increase emissions
Negatively impact vehicle performance, especially for newer vehicles"
*In my area Top Tier gas is the same price as non Top Tier gas stations. So, once again, I urge folks to look for the Top Tier stations in their areas - it costs no more to use the good stuff!
A list of TOP TIER stations:
https://toptiergas.com/licensedbrands/Stig