COSTCO GAS SOURCE REVEALED

Was it Top Tier + 5 cents?

 

Based on this list all this "top-tier" & cheap-tier get the same gas.
Mid tier also seems to same regular gas mixed with premium to makeup the octane level.


Big D Oil Co. #64 — 8214 6th St, Wellington
Bowmar Gas — 5200 S Lowell Blvd, Littleton
Broadway Cardlock — 6185 Broadway, Denver
Castle Pines King Soopers #691 — 7296 Lagae Rd, Castle Rock
Circle K #2706475 — 6702 N Tower Rd, Denver
Circle K Store #2706786 — 202 S Briggs St., Erie
Circle K Store #2709854 — 1600 S Colorado Blvd, Denver
Circle K Store #2709880 — 7701 E Orchard Rd, Greenwood Village
Circle K Store #2741185 — 5390 W 112th Ave, Westminster
Coal Mine Gas Express — 9819 W Coal Mine Ave, Littleton
Costco Gasoline #1014 — 5897 Barnes Rd, Colorado Springs
Costco Gasoline #1022 — 18414 Cottonwood Dr, Parker
Costco Gasoline #1027 — 4000 River Point Pkwy, Sheridan
Costco Gasoline #1178 — 4665 Weitzel St, Timnath
Costco Gasoline #1652 — 4741 North Airport Way Building 2, Denver
Costco Gasoline #439 — 1405 S Havana St, Aurora
Costco Gasoline #440 — 6400 W 92nd Ave, Westminster
Costco Gasoline #443 — 8050 W Quincy Ave, Littleton
Costco Gasoline #468 — 8686 Park Meadows Center Dr, Lone Tree
Costco Gasoline #480 — 600 Marshall Rd, Superior
Costco Gasoline #629 — 16375 N Washington St, Thornton
Costco Gasoline #676 — 5175 Wadsworth Blvd, Arvada
Farmers Korner Gas — 16115 Hwy 9, Breckenridge
Johnstown C-Store — 106 E South 1st St, Johnstown
K & D Enterprise Inc — 1490 S Wadsworth Blvd, Lakewood
King Soopers #86 Fuel Facility — 5275 W 120th Ave, Broomfield
King Soopers Fuel Center #107 — 25751 E Smoky Hill Rd, Aurora
King Soopers Fuel Center #137 — 14887 Candelas Pkwy, Arvada
King Soopers Fuel Center #49 — 2351 S Buckley Rd, Aurora
King Soopers Fuel Center #607 — 1470 S Sheridan Blvd, Denver
King Soopers Fuel Center #675 — 13057 S Parker Rd, Parker
King Soopers Fuel Center #702 — 1619 Pace St, Longmont
King Soopers Fuel Facility #718 — 2395 W 136th Ave, Broomfield
King Soopers Fueling Facility #732 — 750 N Ridge Rd, Castle Rock
Murphy Express #8621 — 13001 Copperhead Trail, Parker
R B Food And Gas — 11010 E 120th Ave, Henderson
S&S Fuels #302 — 9171 E Arapahoe Rd, Greenwood Village
Safeway — 27102 Main St, Conifer
Safeway Fuel #2913 — 2451 S Taft Hill Rd, Fort Collins
Safeway Fuel Center #1635 — 10300 Federal Blvd, Federal Heights
Safeway Fuel Center #1873 — 9640 Washington St, Thornton
Safeway Fuel Center #4614 — 8206 Weld CR 13, Firestone
Singh Food and Sinclair — 213 18th St, Greeley
Stinker Store #333 — 13700 E Quincy Ave, Aurora
Twin Star Energy #2 — 3550 Downing St, Denver
West Evans Sinclair — 2110 S Federal Blvd, Denver

 

It is. It's Top Tier with more detergents.

I think it's specifically developed to address deposit issues plaguing direct injection vehicles.