I have not kept track because I do not care about how much the "discount" is, only that I pay the lowest price. With that said, I use my TSD card for all fill ups because I have dual tanks holding 275 gallons and 25 gallons of DEF.
I often use out of network stations that have a lower price without a discount than an in-network station with a discount. My biggest savings so far on a single fill up was $170 from the listed price, the in-network station would have saved me about about $90, the out of network station saved me an additional $80.
I check all fuel prices in the area for commercial filling stations then pick the cheapest. Sometimes in-network is cheaper, sometimes out of network is cheaper, and again I alway use the TSD card. My use of the TSD card has nothing to do with vehicle size since I still have to get into regular gas stations to fill up the gas tanks on the toy hauler.
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Boondockers
2014 Volvo 630 Tandem 2016 Chevy 3500 DRW, crew cab
2016 Fuzion 325T, 675ah AGM, MSH 3012 inverter, 1400w Solar
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