My engine Makes Cranking nOise~

Help....A week a go My engine Mstarted to make a cranking noise. The noise gets louder as RPM goes up.

When I put the gear in to neutral there is no noise but only when the car moves it makes noise. It is also quiet when just atarted but gets louder as engine gets hot. I thought it was the transmission, but I took it to the workshop and the guys said that It might be engine and he can do nothing.

I was using synthetic oil then juts recently changed to normal oil. Could this be the problem?

ANybody have any idea what could be Wrong?

Does busted cylinder makes cranking noise?