japanese dealers usually don't allow you DIY during warranty period, you might have to "argue" with the corporate if you do run into issues (they want you to go back to dealer for the bullshit services)! w' x) v/ @0 y, g- Q$ v
most American dealers, (Detroit Big 3) usually don't really care, ! R( d+ z ]9 E; {8 y: |if you want to DIY, just remember to keep engine oil and oil filter's receipts