The use of mesostructured zeolites is a strategy to mitigate diffusion restrictions in heavy crude oil conversions. Catalytic activity improvements correlate with textural or acid property changes, but the correlation with diffusional mass transport is atypical. Alkylaromatic molecules serve as probes to determine mass transport restrictions and to introduces two descriptors, "Transport ratio (TRMR)" and "Corrected transport ratio (TRMRc)," proving effective in correlating mesopore insertion effects on zeolite acidity and transport properties with catalytic performance in 1,3,5–Triisopropylbenzene (TIPB) cracking. This screening approach aims to find mesostructured zeolites with an optimal balance of acidity and transport properties.