I have the 2019 Limited version which i have driven a little over 18K now and have NEVER gotten anything above 18 mpg. I started at 13 to 15 mpg when the truck was new and it improved to 18 but no more. I brought that up during my last service (18k) but the dealership didn't want anything to do with what the "sales guys" told me. According to them the typical is 18 mpg and that is about it. I showed him what was listed on the website including that it is rated and recommended for regular gas (he wanted me to try premium). They ran a check and found nothing. I am in San Jose, CA and use Chevron gas. I have mixed driving between city and highway but it does not make much of a difference, I have taken long road trips on it also. Speed change to 65 mph helped a little but as i said, i am capped at 18 mpg. Any ideas? I have not made any changes to the truck and only have cross bars on top. Stock tires and rims.