So where do I start!.. I've been chasing emission problems with my leon to get it through the MOT by completely replacing my pcv piping and replacing exhaust gaskets and welding up minor exhaust leaks etc... so it was still struggling marginly so I did an oil change and BOOM! First start after the oil change oil pissing out everywhere within seconds.. so I shut it off and seen it was coming from the oil filter (brand was Drive+ from GSF Car Parts) so I instantly changed it with another filter ( a Crosland filter from Euro Car Parts) in which straight away it stopped leaking and was was able to take it for an MOT inwhich it now passed the emissions and is on the road... however .. on way way to work yesterday the crosland filter let go a chucked all my oil out while driving... I checked the surface of oil cooler and looks fine .. checked the 27mm nut to see it is loose and it was tight!! I am not overtighten the filter as I have done several oil changes on this car and never had this problem... is it these cheap filters??? I have chucked on another crosland filter on to get it home and haven't started it since... I have a MANN filter waiting to go on... I would like to add that all of these oil filters seem to all look different on the filter oil outlet ports (picture shows original filter before oil change [bottom] and drive+ filter[top] first one to fail. ).. but the filters are bought by registration being checked.. getting really annoyed with chucking in oil in the bloody thing