Difference between bad valve seal and ring piston

My car exhausting smoke on high rpm also losing the oil few days back my mechanic make engine head… Im so confused pls help me is that bad valve seal problem aur bad ring piston? There is no oil on Sparkle plugs.

That symptom means bad rings, not valves,

If you stop the car and smoke comes from the exhaust right as you drive away, that is usually valve oil seals. Since I am not standing in front of your car diagnosing your problem, you either have to take the advice of your mechanic or take the car to another mechanic and get a second opinion. I hope that helps.

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