Could cold temps cause this?
The temp here has been -10 to 15 degrees the last few days. I generally warm my jeep for 10 minutes before driving. The last two days I have had oil blow out the elbow that goes from the valve cover to the air box. I've lost about a half quart of oil. I am running 5w30 full synthetic and I last changed the oil just before Christmas. The oil pressure indicates 5 psi higher than normal (usually it runs around 45 psi). Engine temp is normal and there's no loss of power. Could it be the oil is just really thick when first started and is not draining very well from the top of the engine? Any ideas?
'94 YJ, 2.5L, manual, 235/75/15, 164,000+ miles