KRON San Francisco compared gasoline from Costco and Sam’s Club, highlighting various factors to consider when choosing the best brand. The article cites AAA’s 2016 findings, noting that “fuel use without the TOP TIER™ additive package could result in 2% to 4% lower miles per gallon, increased emissions, and a greater chance of maintenance issues.” TOP TIER™ fuel can lead to long-term savings by reducing fuel consumption and maintenance costs.
