Almost exclusively use Holiday because I have a Luther Card that gets me 10 cents off/gallon and a $6 Works Wash. Plus I buy groceries at Cub Foods and I earn rewards for gas at Holiday for it, so I can double up. Last week had 80 cents off/gallon that I used when I filled up and saved me 16 bucks.
i do that too. you can use getupside for holiday on top of your luther card, the getupsde app just reduces your savings by 3 cents. I also get an additional 3% off on my AMEX card. ive had some fill ups using this method below $2 a gallon in recent months