lUCAS and 20-50w in sub 40 degree temps= stupid

LUCAS is the ABSOLUTE WORST thing you can run in any engine. It actually makes your oil sludge and it will cause serious main and rod bearing damage due to lack of oil distribution.

20-50, thats not TERRIBLE if you park your car inside, but if its outside on days like today, good luck

Change your oil tomorrow if you hope to have that motor last another 50k