This is one of the newer lists that I'm still building. There may have been a few Houston locations that I missed because they were closed and have yet to be retenanted.

Bastrop102 TX-71Closed around 2016, currently vacant. Unusual in the fact that it operated its own gas pumps (no c-store), a holdover from a different brand.
Bryan3227 South Texas AvenueClosed in 2012 and became El Pollo Rico in 2013, which closed by Jan. 2015. Currently Pollo Tote.
Conroe402 East Davis Streetcurrently Taqueria & Panaderia San Luis
Houston9599 Main StreetDemolished?
6850 Martin Luther King Blvdnow Fish & Burger House
6810 Highway 6 Sstrip center location, now La Pupusa Loca?
601 Heights Blvd.Closed around 2014, built 1985? Becoming Lee's Fried Chicken & Donuts, though building is extensively renovated
3502 Dowling StreetClosed 2005?, demolished between 2006 and 2008.
309 Lockwood DriveInternet records say this exists, but I couldn't find it.
17340 Northwest FreewayCurrently Hartz Chicken Buffet, was a Tinsley's
1302 Federal Roadnow Mi Pueblo Auto Sales
11724 Bellaire Blvd.originally Arby's, currently vacant
10810 Westheimer Roadclosed, currently vacant
2702 Yale StreetClosed down around 2015, currently vacant (and very beaten-up)
Tomball11355 Farm to Market 2920 (inside Texaco)Closed and replaced with a McDonald's when Texaco became Shell (2003?)
Waco1105 W. Waco Dr.currently ACE Cash Express