SLO Sol

i have previously posted on HT about my problem i was told to run 5w30 in it i was wondering if it would be safe to run 10w40 temporarily till i figure out my burn problem. what could be my problem the head was new and the rings are fine the onlything is my v-tec is not hooked up yet and what about my valve stems could they be my problem ive lost 6qt's in under a month and there are no leaks. i have a major problem that i need to fix