5-40 Total synthetic with a bottle of zddp plus So far no problems , 10,000 miles and oil pressure is good 35 at idle 60+ on the road , don't burn any oil between changes at 5,000 miles. Use k+n or mobile 1 filter
A little bit of oil burnt in 5,000 miles is OK, that is normal if the engine is being driven hard. Helps keep the rings sealed. I'm talking no more than 1 quart in 5,000 miles. A tiny amount past the guilds helps keep the valves from sticking and cools the exhaust valve
This is why the zinc got reduced, over 100,000 miles enough oil will be burnt and ruin the cats.