Salam. Bro, wanted to ask regarding smoke coming out from the exhaust. I've got a 2011 cg 125 and couple of days ago i went for an engine oil change and to my surprise only about 300-400ml oil came out of the engine after riding for about 900kms. At the workshop I asked the mechanic about it and he said ke aap ke ring piston ka kaam ho ga and then he proceeded to rev the bike and show me the smoke coming out of the bike. Smoke kuch zyada nai hae aur zyada rev karne pe nikalta hae, i reckon at above 6-7k rpm. The bike is 49600 kms driven at the moment and I've always changed my oil on time (850-1000kms intervals) and tuned the bike at every oil change or at every other oil change. I asked the mechanic to put 20w-40, which I have been using for the past 5000kms but he being the ustaaddd jeee put Havoline 20w-50 in my bike and said ke aap 20w40 kyun dalwa rahe haen? ab tou garmiyan chal rhi haen aur aapki bike dhuwan bhi maar rhi hae.
Can you please guide me a bit about this situation and what should I do now?