Here's a visual that might contribute to the conversation. Looks like 4Runners are sort-of in the upper middle-ish of the pack in terms of costs to operate, but boy do they pollute. (The two dots waaay out in the upper right are . . . surprise . . . both Toyotas too: Sequoia and Lexus GX460.)
Source:
Carboncounter.com | Cars evaluated against climate targets