that's only half the question
that's only half the question. maybe a third. sure it takes 87. but does the tow rating use premium? I have not researched this engine...the 5.7 v8 retarded ignition significantly with less than premium gas, and the tow rating stated done with premium. you wanted the most hp in the ole 5.7 tundra you did indeed run premium, which is usually a fallacy for cars/trucks...except when retarding timing nearly 12 degrees for 87.