Hi guys, I'm learning a lot from you and I have a question that I'm sure a lot of people here are afraid to ask: If my car calls for a 5w30 weight oil and I put a 0w40 in it, let say to reduce oil consumption, what's happening inside my engine? Is there going to be be more wear? Is my car going to start some leak because its too tick? Is the engine going to die sooner? I'm just asking, I searched a lot here and couldn't find the answer. Thanks! -Mark.