Looking at the races so far this year, here is Robbys average finish per sponsor:

24th Valvoline
25th Menard's (6th, 33rd, 37th)
27th Camping World / RV's.com (24th, 11th, 40th, 36th, 26th)
28th Jim Beam (8th, 18th, 42nd, 30th, 33rd, 43rd, 19th, 31st)
29th Mapei
33rd Charter Communications (40th, 26th)
36th No Sponsor