Pros - cons ? curious what does it do to your MPG and performance under different conditions.
mpg goes down power goes up i have a ford police interceptor (taurus) 3.7l i run it in. I'd say i average about 3mpg less, haven't done the math but i ran premium in it before, so it was over 2 $ a gallon cheaper. In my 6.2 silverado i ran it back in the day noticed about the same only time it really evened out back then was towing.