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    ampm

    3.6 (37 reviews)
    InexpensiveConvenience Stores
    Open Open 24 hours

    Order ampm Takeout or Delivery

    ampm Photos

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    $2.85 gas price
    Andrew N.

    This ampm location is conveniently located off the 57 freeway at the Diamond Bar exit. I tend to go here when I am low on gas during the commute back home from work. The prices are fair and the location is pretty clean. I paid about $29 for 10 gallons of gas ~ $2.85 per gallon The only thing that precludes them from five stars is that they don't take credit card - they only take debit and cash. Moreover, they charge $0.35 each time you use a credit card. I saw that they were offering a $5 deal where you get a sandwich, soda and chips. I didn't make the purchase but it's not a bad deal for those who are hungry and stop by.

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    6 months ago

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    Ampm S.

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    2 years ago

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    5 years ago

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    2 years ago

    they sell propane but none of them can give us propane so we never get propane. they were very rude.

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    9 years ago

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    17 years ago

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    7 years ago

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    8 years ago

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    Mina M.

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    8 years ago

    Amazing location! So many pump with reasonable gas prices! Filled up my 13 gallon tank in a minute thanks once again Arco.

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    11 years ago

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    11 years ago

    There was really not much to say about a gas station, but a pleasant employee working at the counter was enough to earn 5 stars from me!!

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    11 years ago

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    12 years ago

    Best selection of craft beer and spirits that ive seen around. And their cashiers are always so delightful! I always come here

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    8 years ago

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    17 years ago

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    11 years ago

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    Ask the Community - ampm

    Review Highlights - ampm

    I watched him help a girl who had locked her keys in her car one of the employees called AAA to help assist her.

    Mentioned in 2 reviews

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    Diamond Bar Shell & Mini Mart

    Diamond Bar Shell & Mini Mart

    (39 reviews)

    I can't say anything about the past, more recently the place has been immaculately clean, well…read moreorganized and well stocked. they even added a new carwash and beer cave. Compared to other gas stations, the prices are really good. Staff is very helpful and accommodating. For example, they sell ice really cheap. If they run out, they will make you one on the spot. very important when ice runs out during the summer. Bathrooms are very clean and cleaned daily. One of the few places that sells E85 if you race like me. My only complaint/suggestion is to get a hot dog machine. I don't know what it is about gas station hotdogs but they're really good! anywho, Keep up the great work!!

    I was on a mission to find a touchless car wash, so I turned to Google and Yelp for…read morerecommendations. This place popped up, and I decided to give it a try. I went on a Wednesday around noon, and it was a breeze, no line, super easy access. The payment options were great: you could pay with cash, inside with a code, or by credit or debit card. I especially liked that the machine supports Apple Pay. It was super convenient for a touchless transaction. They have three options: $5.99 for the basic, $11 for the middle tier, and $13 for the premium. I opted for the $11 wash, but honestly, I'm really disappointed. My car came out just as dirty as when I went in, hardly any improvement. The wash quality was really subpar, and even though there was a strong wind drying system, it didn't dry my car at all. I still had water spots everywhere. on the roof, the sides, just a mess. I also should mention, Yelp doesn't let me separate the car wash from the gas station or food mart, so I didn't use those amenities. But based solely on the car wash, I won't be returning. Definitely not worth it.

    ampm - convenience - Updated May 2026

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