The listed HWY MPG for my is 300 is 20mpg. I assume that is at 60mph. Any idea on what mpg is at 100mph?
The 30,000 mile service costs $650. Is it advisable to get this despite the very high cost since my warranty is will run out in a couple months, so they could find anything wrong with it now?
What is a good way of finding a shop that is as good as the dealer?
If you run your car hard and fast, does the oil need to be replaced more often? Right now I do every 5,000 miles.
Should I use synthetic oil?