Why do I smell oil burning when accelerating on incline on freeway only?

Smelling burning oil while accelerating on an incline could indicate several issues. It may be due to oil leaking onto hot engine components, particularly when the engine is under increased load. This can happen if there are worn gaskets, seals, or if the oil is overfilled. It's advisable to have your vehicle inspected by a mechanic to prevent potential engine damage.