I bought a 2009 Ford Focus (the only American car company that didn't take our money) and have heard I should change the oil after 400 miles (rod shavings), then every 3000 after that. Does that still hold true and what is a good oil? In my other car I use a WIX filter, 1/2 conventional and 1/2 synthetic oil with a cup of Lucas. They now have an engine break-in product I'm considering. This is my first new car and I'd like the help.