I have recently got my car's engine overhauled completely and replaced most of the parts. Now the engine heats up to almost middle of the gauge even the fan is manual(on all the time). Please let me know that which is the best engine oil to use for newly overhauled engine. I will change the engine oil after 300 Km of Engine run. For the time being I have poured PSO engine oil (Drum Pack) just for flushing and break-in period.