My Toyota service department says they’ve noticed that over time gasoline from Costco tends to cause more wear on engines because it doesn’t have additives like techron or techroline found in some brands of gasoline like Chevron, Texaco or Mobil. Does this make sense?

Costco versus and other gas brands

VDCdriver April 18, 2012, 5:08pm 6

In fact, Costco’s gas contains 5 times the detergent level that is required by The EPA, so the allegation is baseless–and bizarre.