Originally Posted by philsla
Been using Mobil 1 synthetic oil in a 2003 4.2 engine with just over 200k miles. It has started consuming lots of oil. There is no leak so I can only assume it is being burned even though no smoke shows and it runs like a top. Any suggestions?
Sometimes it's not obvious when the smoke is coming out. Like when you accelerate to get onto a highway, you're looking ahead and to the lane next to you (left). Not behind in your rear view passenger side where the blue smoke would be. Also if you haven't, try the synthetic or mixed synthetic for older engines. They're designed to burn less (may be a higher viscosity for less leakage past rings).