I am not 100%, but I don't think Optimas are suppose to last any longer that other battteries. I know the red tops have a 3yr warranty, but I wouldn't expect much more. In the past 6 months or so, we have gotten ALOT of Optimas back on warranty, most only lasting 1-2 yrs. I had one in the Bronco that only lasting 3 yrs. (most time spent in the Bronco in the garage). When my Motorcraft battery kicks it, I think I might go with and Exide