Was -4 F or -20C last weekend here and truck developed a severe oil leak, drivers side rear of engine. Looked under and oil was being flung around by driver's side front axle, making it difficult to pin down. Thank you brake clean. Found oil temp sensor had come loose. Just tightened. It's a 2018 Ram 40000mi. Don't know if vibration and or extreme temperature swing. But all ok now.