I drive a 2003 Subaru Forester 2.5 X. I may replace the vehicle this coming spring or summer. My vehicle came with only one engine option. Since math is not one of my best subjects, I hope someone on this forum would be able to help me with this math-related question regarding fuel cost over a 10 year period if the next vehicle that I purchase has two or more engine options such as a V4 or V6. My focus on a replacement vehicle would be fuel efficiency. I would like to get the most fuel efficient engine available for the vehicle that I select if that is an option, but I also would want that engine to have high marks for speed acceleration, being able to move the weight of the vehicle, and towing capability. If the most fuel efficient engine is deemed underpowered, such as a V4, and the vehicle has the option for a more powerful engine, such as a turbo V4 or a V6 ( which likely would burn more fuel), and they have better power ratings, I would consider those alternative engine options. To serve as an example of vehicles that have two engine options, I would like to mention the now-discontinued Lincoln LS. The 2003-2005 V6 model had a highway fuel mileage of 26 mpg while the V8 model had 25 mpg. To me, if the vehicle I select has a V6 or V8 engine option with only a 1 mpg highway difference between the two, they are both very capable engines, and the overall price difference between engine options is not too bad, I might be tempted to pick the V8. However, I wish to avoid jumping the gun. I am sure a 1 mpg difference in fuel burn could add up over the course of 10 years. To better prepare myself if I have a choice of engines, could some one do the math and give me a rough idea of how much more money I would spend on fuel with a V8 than a V6 using the following information below?:
Engines: V6(26 mpg highway)/V8(25 mpg highway)
Fuel tank: 20 Gallons
Highway miles driven per day: 26 miles
When to refill the fuel tank: 1/4 tank
Fuel Cost: $2.00 per gallon ( I know prices can change over time, but this is just a sample static price)
Years of driving the vehicle: 10 years
Thanks in advance.