87 5.7L burning oil

[bennylava]

Looking for a little info on the oil burning these engines do. 87 TBI 350. There's no smoke coming out of the tailpipe. There's nothing leaking on the ground. But my truck burns a lot of oil. I always have to add about 4 quarts in total between each oil change. Seems like it might be more than that.

Would adding Lucas to the oil help me out any? I use Royal Purple 10w30. Maybe if I switched to 15w40 Rotella T, it wouldn't burn quite so much?

Any thoughts on what may be causing this? Besides needing a rebuild. Thanks!