That is about normal for that rig. I tow my Gator Trax with a 2019 Tacoma with the 3.5 l. I have an aftermarket tune which helps with the terrible transmission tuning from the factory. I still get 8-10 mpg towing and every grade is running above 3400 rpm. These motors make their power at high rpm. Not the best setup, but it is what it is. The Taco is rated for 6500# towing but that would be a strain. I'm guessing my rig weighs somewhere around 4000-4300#.