At first sight, we thought this was going to be an easy one to answer, thanks to the 1968 photograph below that we happen to have in our possession. However the more we looked into it, the more confused we became!
Anthony Curtis has lived in Las Vegas since 1979 and visited frequently with his parents prior to that, but so much has changed in the interim that even he got confused, and was shocked to learn, when we just took a drive up and down the Strip, that the Tam O'Shanter bar visible in the picture is no longer there, gone to make way for something called the Palazzo...
As you can see from the photograph, there was definitely a Mobil gas station adjacent to The Castaways, which formerly occupied the spot that's now home to The Mirage. The latter opened in November 1989, however, so we don't think you could have filled up with gas there in August 1990. But the Standard gas station, seen right in the foreground of the photo, to the south of the Mirage, may conceivably still have been there in 1990. You didn't happen to keep the receipt, did you? (Ha!)
As to Treasure Island, that opened in 1993, built on land that was previously the Mirage's parking lot, so we doubt there was a gas station there. One thing we learned from this photograph was that back in the late '60s, there were evidently almost as many gas stations on the Strip as there were hotels, the most famous being the Union 76, with its iconic "Free Aspirin and Tender Sympathy" sign (now in the Neon Boneyard), which occupied the spot now taken up by the CVS Pharmacy next to the Monte Carlo.
We hope the photo jogs your memory; if so, let us know where you pumped that gas (but don't tell us how much you paid per gallon; that would only make us cry.)
