Oil = white sludge

but not using any coolant

Whats the score there? its been mega cold the last few days & i noticed the car was tapping more than usual, so i checked the oil & its gone to shite, nowt in the cap, just on the dipstick.

Soooo, i am guessing its shafted, but what to replace it with? is it worth getting an uprated one, or sticking with genuine ford?

Also going to get the tappets & valve stem oil seals done at same time, anything else worth doing?

Cheers