Here is a story, truck pulls in shop customer says its using oil but no leaks,runs ok. plug the diagnostic machine in no codes, check the filter bowl for signs of oil in fuel looks good. look at exhaust and tubo for signs of oil nothing. so i look at the filter minder it looks ok still in the yellow. pull the air filter box top off and holy s*** , the filter was a nightmere bugs, leaves,dirt,mud yes thier was actually mud stuck to the under side of the pleates,paper and some how a brown paper bag???? . now i look down the intake tube at the turbo and ccv tube and both are coverd in an oily mess. the air filter was so pluged the engine was pulling air from the ccv tube,along with some oil. so for fun and to learn i put it back together. start the truck and here a vacume leak look around and it was coming from the oil dipstick tube :roflmao: hard to beleave it but true! it did run rough but it ran. after i kleend the air box and installed a new filter i tell the customer NEVER EVER TRUST THAT CRAPY FILTER MINDER!!!!!!!!!!!!!!!