Took the car to the garage. They found allot of oil in the cylinders and exhaust, far too much for it to have come from the residual oil from a rocker cover change.

What could have failed for oil to be pumping in the cylinders ?

Theres no oil in the coolant, no visable leaks from the engine.

Would the CCV be the first place to look or vacuum hoses?

This all started after rocker cover gasket replace. Could be unrelated. I'm not experienced enough to know.

Please let me know your top causes for this so we can hopefully attack them one by one.

Thanks

Ben