Does a muffler delete void a Dodge warranty?

I’m gonna try to do some work on my Sorento at home, and I’m feeling pretty good about getting under the hood. I just want to make sure I have enough materials to get started. How many spark plugs do I need for my Kia Sorento?

I'm taking my three nephews on a road trip from L.A. to Vegas. I’m going to load them up in my 2011 Subaru Outback and barrel through the Mojave Desert. For kicks, I told the boys the car will likely break down in the heat, and vultures will end up having us for dinner. That being said, I actually do want to return them to their parents in one piece. What type of oil does a 2011 Subaru Outback take?

I have a hard time finding my keys in my car at night without the lights on. How can I make the interior lights turn on when I open the door of my Honda Civic?