gonna be changing oil in my 93z. it has 99,000 miles on it. only gets driven maybe 1000-1500 miles a year topps. any suggestions? anbody use royal purple( is there really a hp increase). or any other synthetics? let me know what you run and results. will probably switch to k+n oil filter also. thanks

 

My car sees less miles then your annually. The 5W-30 Mobil 1 synthetic with a Delco oil filter is working fine for me. I have seen tests in magazines where they gain a little power using the Royal Purple stuff, but for the cost, I'll just look for that power elsewhere and stick with what I'm using.