Mainly, not getting snowed in the winter. I live in the sticks, and with just one inch of snow, it get's crazy slick. i'm positive the subwoofers in the back don't help a bit, But i justify that by saying that it adds weight in the back of my car. Nor to the offroad tires help, I justify that by saying it helps with the snow. I'm going to get a set of cheapo rims and change out for summer tires. and switch between the two. i took off my roof rack. I'm just going to have to get a little honda or something, and just use the pathfinder in the winter. I can't justify dropping a mint to hypermile a gas hog anyway, when i could just buy a 1000buck early nineties honda beater and be good