Yes they can in regard to size, tread pattern and inflation pressure.
21 city and 26 highway with a good air filter and properly inflated tires. both of these variables make a huge difference.
My 1994 Cougar XR7 with a 3.8 Liter V6 averages about 24 mpg. The car is very aerodynamic. I use Michelin tires I think that makes a big difference.
yes they do as they have different friction coefficiants
difference between a/s and a/t tires
It lowers your mpg
There are many different types of truck tires, but the average price seems to be around $70-$100. The size and weight of the tires make the difference.
I went from stock tires to 31 by 10.5 and lost about 4 mpg so I would expect at least 6-8 with 35
You can improve gas mileage by making sure your engine is tuned up. Make sure the tires are at the proper inflation. Drive at the posted speed limits.
difference
With the cab fairing up top on the midroof, the aerodynamics should match, and there'll no MPG difference.
Air
I own a 2001 Tacoma Prerunner - V6 - 3.4 Liter engine. If you drive conservatively, you can get 19-20 mpg in the city (with AC). On the highway I can get 21 or 22 mpg. On long-distance trips, if I drop the tailgate, and drive no more than 65 mph, then I can get as much as 24 mpg. I use premium gas, change the air filter when needed, and keep tires properly inflated. Replacing the air filter makes a BIG difference.