The rear end of my truck has about 6" of clearance and my front has about 2", and I'm getting a very stiff ride and bad gas mileage. I'm pretty sure it's either the shocks or the springs, there's not much else it can be? Which would be a good bet to start with, they are both stock and never replaced. I would think the springs?

Also, would a saggy front end hurt gas mileage?

Thanks guys.

 

Not familiar with the Mazda's so I don't want to give bad advice, A lower front end would be better for gas mileage than a higher front end due to less wind resistance.