Costco Gas Prices in Rancho Cucamonga, California
Rancho Cucamonga · Warehouse #678
11800 4TH ST, Rancho Cucamonga, California 91730-6129
Prices updated: September 4, 2026 at 9:00 PM
Regular
$5.299
PRICE PER GALLON
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Premium
$5.659
PRICE PER GALLON
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Current gas prices at Costco #678
This Costco gas station is located at 11800 4TH ST in Rancho Cucamonga, California. The latest reported fuel prices are regular at $5.299/gal, premium at $5.659/gal. Prices were last updated on September 4, 2026 at 9:00 PM.
Get directions to this Costco gas station30-Day Price History
30-day change
Regular
$5.299+0.100 (1.9%)
Premium
$5.659+0.060 (1.1%)
DateRegPrem
Sep 4, 9:00 PM$5.299$5.659
Sep 4, 7:00 PM$5.199$5.659
Sep 3, 8:00 PM$5.159$5.659
Sep 2, 3:00 PM$5.199$5.659
Sep 1, 5:00 PM$5.129$5.589
Aug 30, 7:00 PM—$5.589
Aug 30, 6:00 PM$5.129$5.589
Aug 30, 3:00 PM$5.099$5.559
Aug 28, 5:00 PM$5.079$5.559
Aug 27, 10:00 PM$5.059$5.559
Aug 27, 5:00 PM$5.099$5.529
Aug 26, 10:00 PM$5.099$5.499
Aug 23, 4:00 PM$5.059$5.459
Aug 19, 4:00 PM$4.999$5.399
Aug 17, 10:00 PM$4.999$5.359
Aug 16, 7:00 PM$4.959$5.359
Aug 13, 8:00 PM$4.999$5.399
Aug 13, 3:00 PM$4.959$5.399
Aug 11, 10:00 PM$4.999$5.399
Aug 11, 5:00 PM$5.099$5.499
Aug 9, 6:00 PM$5.199$5.599