i need help figuring out y my truck as started blackening oil so quick. up untill resetly i could go easly go 3000 miles without the oil darkening at all. but ever since i upgraded my injectors the oil goes black withing 5miles of an oil change and i meen black, to the point that u can no longer see the writing on the dipstick anylonger. the injectors i installed are F1 m2. 5's. i understian the langer injects meen more soot, but pitch black oil within 5 miles seems a bit much if u ask me. the oil that i am runing is amsoil 5w 30. what could be causing this, could it be a bad injectior or somthing?