Okay, I'm about to change the oil in my civic and I was wondering what the best type of oil is for it. Keep in mind it's winter. I tried to research it but I found nothing. My mom says she just used 10W-40, she doesn't believe in synthetic because she thinks it breaks down to easy. I never really new anything about oil I just did what she said. My dad hates cars so he doesn't have a clue. So if anyone could lead me in the right direction that would be great. Thanks!