yeh had the same problem fitted my t34 and mongoose exhaust,so thought i'll change oil and filter 2! filled with mobil one motorsport cost £47 for oil! went to crail the next! did 18 runs managing best time of 13.6!not bad for stg 1! thought it would be senible to check the oil before driving home! to my surprise none showing on the dip stick!it had all been blown out the same place as urs and under the car what a mess!i knew i should have spent the extra hour it fitting the breather kit that was sitting in my boot! Plus won't be using mobil oil again! as i never had this problem usuing castrol rs!