Originally Posted By: Bullet
I use 20w50 in a 1996 Avalon because it will smoke at an idle with 5w30. A 15w40 will use about a quart in 2000 miles, but the 20w50 it stays at the full mark. No problems yet. No RX, MMO, etc helped. I just waisted my money. Now I just use the think oil.
If the engine is smoking and using oil because of worn parts, or bad or broken valve seals thick oil is your friend. MMO or A-Rx would be a waste of good money.