Costco Gas Prices in San Diego, CA
- Regular avg
- $5.229
- Premium avg
- $5.699
- Stations reporting
- 4
Avg of 4 stations · per gallon · ▲▼ change since the previous day
Price history in San Diego
Last 30 days · per gallonRegular: $5.889 on Oct 15 to $5.229 on Nov 13, low $5.229, high $5.889. Premium: $6.269 on Oct 15 to $5.699 on Nov 13, low $5.699, high $6.269.
Costco gas in San Diego today
San Diego has 4 Costco gas stations: Carmel Mountain at 12350 Carmel Mountain Rd, Mission Valley at 2345 Fenton Pkwy, Morena at 4605 Morena Blvd, and SE San Diego at 650 Gateway Center Dr.
Today’s Regular prices span $0.060 across the 4 stations reporting, from the cheapest to the most expensive.
2 stations are tied at today’s lowest price.
Costco Regular prices in San Diego have eased about $0.660 over the past month, from $5.889 a month ago.
The furthest any single station moved was Carmel Mountain, down $0.740.
- Cheapest today
- Mission Valley — $5.199
- Most expensive today
- Morena — $5.259
- vs the California average
- $0.210 above, at $5.019
- Diesel
- sold at none of the 4 stations
Costco gas stations in San Diego
Morena
4605 Morena Blvd, San Diego
Regular · Premium
Carmel Mountain
12350 Carmel Mountain Rd, San Diego
Regular · Premium
SE San Diego
650 Gateway Center Dr, San Diego
Regular · Premium
Mission Valley
2345 Fenton Pkwy, San Diego
Regular · Premium
Fuel grades at Costco in San Diego
All 4 Costco gas stations in San Diego sell Kirkland Signature fuel, which is Top Tier certified. None of them reported a diesel price in the last 30 days.
| Grade | Stations | Avg today | Cheapest |
|---|---|---|---|
| Regular | 4 | $5.229 | SE San Diego $5.199 |
| Premium | 4 | $5.699 | Morena $5.699 |
Regular
all 4 stations87-octane Kirkland Signature unleaded, the grade most cars are built for.
- Same TOP TIER detergent package as premium. The only difference between the two is octane.
- Can contain up to 10% ethanol, like most US gasoline. The pump label shows the blend.
Premium
all 4 stationsKirkland Signature premium: 91 octane at most stations, 93 in some regions.
- Only needed if your owner’s manual requires or recommends premium. Higher octane resists engine knock; it adds nothing to an engine built for regular.
- Carries the same detergent additives as regular.
Not sold at Costco
- Mid-grade (89): Costco pumps offer regular and premium only.
- Cash sales: every Costco pump is card-only.
Is Costco gas in San Diego good quality?
Costco does not sell a refiner’s brand. Every pump in San Diego dispenses Costco’s own Kirkland Signature fuel, bought from major refiners and distributors in the region and finished with Costco’s additive package.
Kirkland Signature gasoline is licensed TOP TIER, the detergent standard set by automakers including GM, Ford, Toyota, Honda and BMW. Costco puts its detergent level at about five times the EPA minimum, which is what keeps intake valves and fuel injectors clear of carbon deposits. Costco’s gasoline also contains friction modifiers that it says reduce engine wear.
In short, the low price is not a lower grade. The saving comes from Costco running its gas as a membership perk on thin margins, not from the fuel.
Costco gas station hours in San Diego
On weekdays the earliest pumps in San Diego come on at 4:30 a.m. (Mission Valley) and the last ones switch off at 10 p.m. (Carmel Mountain). Pump hours run longer than the warehouse's, and weekends are shorter. Times are local.
| Station | Mon–Fri | Sat | Sun |
|---|---|---|---|
| Carmel Mountain | 5:30 a.m. – 10 p.m. | 6 a.m. – 8:30 p.m. | 6 a.m. – 7:30 p.m. |
| Mission Valley | 4:30 a.m. – 10 p.m. | 5:30 a.m. – 8 p.m. | 5:30 a.m. – 7 p.m. |
| Morena | 5:30 a.m. – 10 p.m. | 6 a.m. – 8:30 p.m. | 6 a.m. – 7:30 p.m. |
| SE San Diego | 5:30 a.m. – 10 p.m. | 6 a.m. – 8:30 p.m. | 6 a.m. – 7:30 p.m. |
What else is at Costco warehouses in San Diego
Every Costco gas station sits in a warehouse parking lot, so a fill-up can share a trip with the rest of the list.
- Food court
- 4 of 4
- Pharmacy
- 4 of 4
- Optical
- 4 of 4
- Tire center
- 4 of 4
- Car wash
- 0 of 4
- EV charging
- 0 of 4
How Costco gas works in San Diego
Bring your card. The pump asks for an active Costco membership card before it starts, at all 4 gas stations in San Diego. Without a membership, a Costco Shop Card loaded with credit works the same way.
Pay by card. The pumps take Visa, most debit cards and the Costco Shop Card. There is no cash, and a card hold of up to $150 can show until the fill posts.
Check the price first. Each station sets its own price, usually once a day, so two Costco stations in San Diego can differ. Today the regular average here is $5.229. The prices on this page are collected once daily and can lag a same-day change at the pump.
Go early or late. Lines are longest on weekend afternoons and weekday evenings. The first pumps here open at 4:30 a.m. on weekdays.
Cities near San Diego
- Costco gas prices La Mesa · CA · 7 mi$5.159
- Costco gas prices Santee · CA · 9 mi$5.199
- Costco gas prices Poway · CA · 10 mi$5.259
- Costco gas prices Chula Vista · CA · 15 mi$5.279
- Costco gas prices San Marcos · CA · 21 mi$5.299
- Costco gas prices Carlsbad · CA · 23 mi$5.259
- Costco gas prices Vista · CA · 26 mi$5.259
- Costco gas prices Temecula · CA · 48 mi$4.999
States near California
- Costco gas prices Nevada · 9 stations$4.379
- Costco gas prices Arizona · 21 stations$3.658
- Costco gas prices Utah · 16 stations$3.833
- Costco gas prices Idaho · 8 stations$3.824
Costco gas in San Diego: common questions
Where is the cheapest Costco gas in San Diego today?
Mission Valley posts the lowest Regular price in San Diego, $5.199 as of the November 13, 2026 reading — $0.060 under Morena, the most expensive of the 4 stations reporting. It shares that price with 1 other station.
How many Costco gas stations are there in San Diego?
San Diego has 4 Costco warehouses with a gas station, and all of them reported a price in the last 30 days.
Does any Costco gas station in San Diego sell diesel?
No — none of the 4 stations in San Diego has reported a diesel price in the last 30 days. Costco sells diesel at a minority of its locations in the US.
Is Costco gas cheaper in San Diego than in California?
No — the average Costco Regular price in San Diego is $5.229, $0.210 above the California average of $5.019 as of the November 13, 2026 reading.
Are Costco gas prices in San Diego going up or down?
Down — the average Costco Regular price in San Diego has eased about $0.660 over the past month, from $5.889 to $5.229.