Jim Thomas 
2018 Toyota Tacoma Access Cab SR 4dr Access Cab 6.1 ft. SB (2.7L 4cyl 6A)
Up and Down
 I bought this truck brand new and have had it two months and driven about 2,000 miles.  Average gas mileage is 22-23 mpg depending on the mix of city and highway.  The only major complaint I have is the cruise control.  Unless you are on nearly perfectly flat roads the transmission is constantly shifting up and down with corresponding up and down rpm's.  The interactive radar slows you down to the speed of the vehicle in front of you, which is a nice safety feature,  but if you move over to a clear lane - look out.  I was 5 mph below my set speed of 70 in Texas and when I changed lanes the cruise floored it -engine rpms went to 5,000 until we were back to 70 and then it shifted back to high gear and dropped the rpms.  This has to be hard on the engine, especially when red line starts at about 5500 rpms.  I will probably just drive it without using cruise any more which is sad because I really wanted cruise on my truck.  Obviously, the engineers have not reached the correct mix of acceptable performance and smoothness between the engine size, transmission and electronics.   The former 5 speed manual transmission was a much better product.