Diamond Gas & Mart

Most convenient and inexpensive gasoline prices in SJ CA.

The cashier working Wednesday, June 29th was very friendly and honest. I had asked for 45$ in gas but handed him 46$ and he gave me my dollar back. The gas was also the cheapest I have seen in the area.

Is not that busy so you don't waste time waiting to load gas.

10/10/2022 one of the lowest place to get gas with cash

This place is conveniently located near Highway 85 at De Anza Boulevard and has just about the best gasoline and diesel prices I've seen anywhere in that general area. It's just a basic gas station but I do highly recommend it for fueling up your vehicle.

Best gas prices in the area, same as Sunnyvale Costco.

9/21/2019 Update: gas prices much higher now compared to Sunnyvale Costco! I'll be watching... and will remove 2 stars if prices don't settle back down in the next couple of days.

Best managed gas station ever. Water in windshield washer reservoir is clean, squeegees do not leave streaks, pavement is clean, trash bins are emptied regularly, and prices are lowest in the area. I have fueled both of my cars there exclusively for months.

Diamond Gas is a hidden gem in terms of affordable gas in the West San Jose and Cupertino area. On this Sunday afternoon, there was only one other car filling up in the lowest cost station in the area. Even Costco gas doesn't offer lower prices from what I can tell. Hopefully, it's not a temporary promotion.

This place always seems to have the cheapest prices around which makes it my go-to, especially for filling the 42 gallon Suburban tank! No walk in convenience store, but there is a small receptacle stocked with cigarettes and energy drinks, etc.

Good prices and gas performance is excellent( at least for my car) I regret everytime that I get gas form a different place

Friendly customer service employees, nothing dilapidated as others claim, Diamond Gas Station's facility has totally revamped their facility, and upgraded their online pay system for online transactions, a perk to customers using their online pay accounts, unlike other gas stations who have a surcharge for online debit transactions, there's no extra fees for using debit cards, top tier gasoline at much lower prices, their gasoline have extra cleaning fuel additives for better engine performance, plenty of gas pumps which are much newer than most gas stations, gasoline hoses were recently replaced with longer-reach to serve both sides of the pumps, recommend visiting the facility early-morning or late-evening hours due to the high demand of their gasoline, last; there's a clean restroom available, while most gas stations claim theirs is out of order, or it's foul-smelling due to lack of maintenance, I give it a five thumbs up

I had to hold the pump at a higher angle or else it would shut off. That's a small price to pay for gas that's 20 cents cheaper than the stations across the street, and 40 cents cheaper than most places

Very good experience. Station has a small store with discounts on cigarettes and drinks and snacks. Check them out. Low prices!

$3.15 a gallon credit/debit! In Saratoga, I’ll take it! A penny less than Google Maps advertised too! Such a deal!

I am a rideshare driver and I love their gasoline prices. Excellent staff, thank you.

Best gas price in whole of san jose.

Very cheap gas price when compared to other gas stations.

Need to come back again for everyone else need it more bigger or everyone else coupons and good ideas for everyone else

Excellent place to get gas in San Jose area.

The gas prices are great, the music is lovely, and the attendants are friendly.