I once borrowed a friends 1200. He drove it 50 miles with frozen water plugging his radiator. It did a number on his engine so it used a quart of oil in 15 miles but oil was cheap.

agreed, they stem seals are probable. the trouble can be isolated by measuring compression.
-remove ALL of the spark plugs, open throttle
( ground the coil lead) set brake and put transmission in neutral.

- screw compression gauge into spark plug hole
- crank so the piston pumps 5 strokes and read the gauge.
then repeat on the other 3 cylinders

If compresion is low( under 120psi) squirt some oil into the spark plug holes and compare readings. If low compresion goes up the rings are leaking. if it does not, the valves are leaking.

If the compression is good the valve stem seals are highly suspect

ps: wipe the oil off your lady friend's car.

Valve stem seals?

hey guys got a free 120y every thing will pass rego even has good tyres and new struts and springs lol..
3 problems tho..i noticed when it starts with chock it blows a puff of smoke immediatly gose away..when i give it a rev it gives a puff of white smoke but goes away immediatly till i rev it again..and lucky number 3...when i rev it it painted my other halfs front bumper black lol..its like sooty #OOPS#...can any 1 help me out with what it is