Rich, I have been using Lucas with every oil change since I broke in my L35 in 04. I have had no problems and use 1 quart for insurance against dry start ups. I don't think you have anything to worry about. I broke it in with a 20w50 but now run 10w40 Penzoil. After sitting for 4+ months in the winter, my engine starts on the first try and hear the tappets for only a few seconds with 60 psi oil pressure.
