I don't think he asked if he should ditch the spare. He asked how much gas he will save if he did. Well that's hard to tell. The only way to find out is to actualy do it and seeing for yourself. So this topic is pretty much pointless.
If I was you though, I wouldn't do it. I got spare tire in my trunk and also med kit, tire inflator, jump starter cables, compact jump starter, jack, wrench, two bags for groceries, badminton racket and three birdies, flash light and spare batteries. I also have some stuff inside of my car. I guess MPG would improve a little bit if I ditched all that, but what if I need it? I don't want to find out by being strangled on the side of the road at night in the middle on nowhere.
The best way to improve MPG is to get a more fuel efficient car. All these extremes like removing spare tire, filling your tank half way, messing with oil weight or overinflating your tires to the max are quite silly. All these people should have thought about it before they bought a gasguzzler. That's about it.
If I was you though, I wouldn't do it. I got spare tire in my trunk and also med kit, tire inflator, jump starter cables, compact jump starter, jack, wrench, two bags for groceries, badminton racket and three birdies, flash light and spare batteries. I also have some stuff inside of my car. I guess MPG would improve a little bit if I ditched all that, but what if I need it? I don't want to find out by being strangled on the side of the road at night in the middle on nowhere.
The best way to improve MPG is to get a more fuel efficient car. All these extremes like removing spare tire, filling your tank half way, messing with oil weight or overinflating your tires to the max are quite silly. All these people should have thought about it before they bought a gasguzzler. That's about it.