Measure your gas mileage over the course of two tanks of 87 then two tanks of 90. Compare the difference in mileage to the difference in cost. My guess is that it won’t make much of a difference. A 2003 car will run fine on both fuels.
Measure your gas mileage over the course of two tanks of 87 then two tanks of 90. Compare the difference in mileage to the difference in cost. My guess is that it won’t make much of a difference. A 2003 car will run fine on both fuels.