We made sure to stop here before our tank was on empty!…read more Big D Oil in Custer, South Dakota sells Sinclair gasoline. Gas price was fair for the area, and really cheap compared to the prices we are used to in California. Convenience store was decent size. Good stop to make in Custer, SD.

This is my second favorite gas station in town. Great gas and customer service. Better stop before…read moreyou are on empty!

My family stopped here for snacks and a bathroom break during our vacation. It's a nice convenience…read morestore with friendly, kind employees. I'm attaching a photo I took of a flier that was in one of the bathroom stalls. I will always shop at stores that try to help human trafficking victims. The next time I'm in Custer, this Conoco station will be where I buy fuel and snacks. Thank you for being good people!

I stopped here for gas, as they discount it if you pay with cash. I had just over half a tank when…read moreI pulled in, yet the total full amount turned out to be more than half of my tank size. I couldn't find a weights and measures sticker, but not sure what the laws are here. Anyway, I'm a little skeptical about the amount pumped vs the amount I was charged for. The attendant at the counter was friendly.

Basic, basic, basic. The lady at the gift shop in Mount Rushmore suggested that these folks might…read morehave postcard stamps and so I made a stop here for stamps, snacks and a drink. They had stamps, but they'd only sell me one. Strange. But they had candy bars and they had cold water. So there was that.

Small town gas station and c store. A very basic gas station with a couple pumps, and inside you…read morewill find the most basic of basics. Ice, cold beer (plain Jane domestic), snacks and that is about it. Sparse and dated, but if you are in Keystone, this is about it, so you might as well stop and fill up.

I had fine dust from 3 long gravel stretches: 1) getting from Moorecroft to the Devils Tower and…read more2) a long Wildlife Loop in Custer State Park. It did a great job and I didn't get wet. It's completely touches and fast. 10 out of 10 stars

Service is fine and clean, it's just expensive. You pay 25 cents for 15 seconds of wash time, and…read morethe timer immediately starts as soon as you hit 2:30, so by the time you select your soap and grab the sprayer, you've already wasted .50 cents. It does a banger job at spraying down your car and getting it clean, but the pricing is a bit predatory in my opinion.

Coffee is fresh cheap and love that you can sweeten it as you like. Bathrooms are cleanread more

Usually the cheapest for gas. Even with the newly remodeled store they still can't seem to keep…read morewindows wash stations full or trash cans empty. I rarely go inside.

Went there to get propane filled and nobody available to do it. Maybe you need to train more staff…read moreon propane filling? Disappointing.

I am not impressed with the day time manager. Rude, condescending and just nasty. She really should…read morefind a new job if she's that miserable. Also, why does the Subway never have the correct supplies to make the sandwiches? They are always outta something. Corporate really needs to look into this place. Poorly ran and managed, especially the Subway. How do they always not have something?

Cute store! Looks clean too…read more The gas pumps looks tidy and had enough space for everyone to like in for a fill up.

Don't get ripped off! The price on the sign is the cash price and is 50 cents LOWER than credit…read morecard price. IMHO this is false advertising. Note the station employee said 'everyone does it.'

Simple gas station with average prices. The whole place has 4 gas pumps. Its about 5 cents cheaper…read moreto pay cash.. but they do accept credit card as well (not like arco). The convenient store offers snacks from chips to dairy products. They also sell lotto tickets here.

This whole in the wall gas station! In the middle of nowhere Wyoming was convenient! The attendant…read moredid not say hi but just took my money and I told her the number gas! I bought some rockstar drinks put in gas and was off I my road trip !

I don't know If I have the right gas station. But I was looking for the four way gas station with…read moreold style gas pumps with dial numbers. They trusted me to pay after I gassed up and rounded the price to lower $0.25. and thanked me for stopping by. Sweet lady. If wrong place, still seemed like a very friendly town and respectful of all the folks passing through. ty