Valvoline VR-1 vs. Lucas Hot Rod oil

after my 340 was broken in with vr-1 10w-30 i switched to synthetic Royal purple XRP 10-40 ADDED 1/2 bottle of some zddp additive evey 2nd oil change , 10,000 miles later was in pefect shape ,tore it down before storing the 340 and it looked new inside no visible wear . on my new stroker woth roller cam using VR- 1 synthetic 10-30