Air Shocks

I run mine at 35 lbs. which helps the slightly weak springs. Every once in a while I fill the trunk with stuff and put them up to 50lbs to stop a sag. I'd never go higher for all the reasons stated above. It's a poor mans way to level it and the ride at 35lbs is not compromised. Use them right and they'll be fine. And I agree with others, replacing the springs is the proper way to go.