to fill up the sliverado at $3.00 per gallon. would be $78.00
to fill up the accord at $3.00 per gallon it would be $51.00
Difference per week approx $27.00 X 4 weeks $108.00
this is flawed since you dont fill up the cars at the same interval due to different tank sizes and mpg. also, it doesnt cost $51 to fill up the accord since you never empty out all 17 gallons anyway.
youre comparing 2 different cars.... if you dont need the truck... then get the accord.