Hi, some help needed please! Got a focus 2.0 TDCI 07 plate with 62,000 miles service is due end of this month but just starting to have a low oil pressure light come on only when the engine is hot and is idling 750-800 RPM. Starting when cold and driving the car the light doesn’t come on its only after a journey longer than 15mins doing over 50mph (i.e. up to normal operating temperature) the light comes on when down to idle. If I blip the throttle to 1250 RPM the light goes off most of the time. Also engine sounds fine and I have checked the oil level its only used 1/4 of a litre since last service.

I’m thinking get it serviced as soon as possible as oil could have lost its viscosity and getting to thin when hot? Would appreciate come comments please. Thank you