Costco and Chevron are not the same fuel, but in the U.S. both are typically TOP TIER retailers. The decision is additive branding versus price.
Chevron
Chevron’s differentiator is Techron, a trademarked detergent package. If you specifically want Techron, you need a Chevron (or Texaco in some markets) pump — Costco does not sell Techron.
Costco
Costco sells Kirkland Signature gasoline with a TOP TIER detergent treat and warehouse-club pricing for members. You will not get Chevron’s loyalty app, but you usually pay less per gallon. Browse U.S. stations or a large metro such as Los Angeles.
Quick pick
- Need Techron by name → Chevron.
- Want TOP TIER regular at the lowest nearby price and you have a membership → Costco.
- Engine requires premium → match the octane on the pump; Costco premium is often 91, sometimes 93. See 91 vs 93.