Hi all
Was just wondering how many miles before i should change the spark plugs ?
My car currently has about 58,000 miles

The information you are requesting is contained in your owners manual. If you don't have an owners manual, you can download one for free here:

https://www.mopar.com/dodge/en-us/care/owners-manual.html

Also depends on which engine you have. Be sure to include pertinent info like that in the future if you have questions.

It's a 3.6

100k..........