hi, i read about oil performance articles and im confused. i have 100k miles 2lt ford pinto engine with motul 6100 10w-40. people say 10w-60 is really good and gained performance. my oil pump will stress while pumping no. 60 inside my engine ?? i dont think so number is big but its more liquify than 10w, i wanna be sure about this. a mechaid said,you running engine with LPG and no carbon inside of cyclinders, there could be space near pistons and thick oil will fill it, high compression high power i found this video https://www.youtube.com/watch?v=PZUUllfRvYM a thick oil really good for performance even new engines ?