You may be burning that much oil because you're limiting the rpms to
3800. High rpms under a heavy load help seat the rings. Avoid the use
of synthetic oil until your engine is broken in enough to stop passing
oil past the rings. Like Tamaroak said, engines shouldn't burn any oil.

Gene and Train are correct. Break-in does not mean babying an engine.
Weakly broken in engines eventually develop ridges at the top of the
cylinders which are lower than normal. The sharp edges of the top
piston rings start having disagreements with this ridge when the engine
eventually is run at redline RPMs after break-in.

John