The Crossfire requires synthetic oil, which is about $5/quart instead of $1.50. It takes 8 1/2 qaurts instead of 5 or 6. Also, the filter is a Mercedes part, so it cost about $10-$15 instead of $3. Then you put dealer markups and labor on top of that. Most people are paying from $75 to $90 at the dealer. You can change it yourself for around $50. Keep in mind that it only needs to be changed about every 7K miles instead of 3K like a normal car, so it isn't quite as bad as it sounds.