Materials receipts and a log of what and when required services are performed are both necessary in the event of a warranty claim. It's NOT necessary to have a seperate receipt for each filter and individual fluid (engine or transmission fluid) change quantity amount - a receipt for the large quantities you buy will be sufficient as long as that quantity (or multiples if you've had to restock your supplies) is sufficient to cover the number of fluid and filter changes up to the point of a powertrain warranty claim. The courts have consistently accepted the submission of a log and receipts as sufficient evidence that the service was performed. But keep the receipts and log in an envelope IN THE CAR since the car manufacturer's agent (typically the dealer's service manager, though it could include inspection by a manufacturer rep.) has the right to inspect them at the time a warranty claim is requested. You might be obligated to allow copies to be made, but NEVER surrender or allow those receipts and your log out of your sight. They're your only proof that you peformed the required maintenance. If the dealer or manufacturer question whether your maintenance was incorrectly performed, politely invite them to prove it in court. It's their burden to prove incompetence, not yours to prove otherwise.
(By the way, what's a certified Scion?)
[ January 16, 2006, 11:55 AM: Message edited by: Ray H ]