Assume garage put Lucas in. I wouldn't run anything but normal oil for running in a new engine. Running in an engine = 'wearing in an engine' ... piston & rings to cylinder, bearings to crank/rods, valves to valve guides, cam to lifters, gears, etc. Most are no problem, but piston & rings to cylinder can be. Piston needs lubricant, compression rings require no lubricant... if oil ring doesn't seal properly and too much oil/lubricant on cylinder/compression rings the cylinder/rings glaze up and don't seat in and engine burns oil for life.

Oh, engine can burn a litre every 500 and you won't see it any smoke.. maybe if following you might see puff once in awhile.
As for bobtheoilguy's test; that was on gear oil at room temperature. Gear oil gets pretty hot when running... wonder what difference it would make in the test.
