Dhushaker

Hi Folks, I bought a KE 74 recently (a week before). When i was buying i checked oil dipstick and oil cap there was no issues. But after changing the oil to 15W-40 in the service, it started to spit some oil in dipstick.. Also its struggling to start in the morning. But after starting there are no issues such as engine miss when running, white smoke and no oil or coolent decrease. Also noticed that oil leaks in the plug Is this symptoms of engine under compression? TIA