Unfortunately most people do choose to have their oil changes done by aftermarket companies, such as jiffy lube. Companies such as this do not use factory authorized oil filters which are specifically designed to maintain the life of the oil and protect it from being "filtered" through a clogged filter. The reason these places can provide such cheap oil changes is that they use cheap part (i.e oil filters) Which is also why most vehicles these days have required maintinence lights to alert the driver if there is a need for an oil change before the recomended 5k. I see vehicles come through our service department everyday with over 200k miles on them and they have always had their oil changes done at 5000 schedule. They have also had all of the work done by factory certified maintinence shops.[/quote] I agree with Jennydawn as I also run the Service Department for a Toyota Dealership. Going to Jiffylubes and other aftermarket garages may seem cheaper but in reality those garages use poor quality parts and the technicians do not have the same diagnostic equipment as the Dealerships so when thinking you are saving 5 or 10 per hour on repairs you will actually spend more since the aftermarket shops will take longer and cost you more.