Just wondering if anyone in BITOG-land is 'limited' in what they can do for an oil change, or can't do the change they would like to do... For example, I recently bought a 2002 Chevrolet Cavalier with a 1-year warranty through Global. To maintain it, I have to have oil and filter changes done at a certified place every 6K kilometers (4k miles) - no DIY's, no going over that mileage at all. With the amount of driving I do, this works out to an oil change every 2 - 3 months. Because off this, I get changes done with dino oil wherever there is a decent price. Currently have Motomaster Formula 1 5W-30 and Motomastrer filter in the car. Given my druthers, I would probably do synthetic changes myself every 6 months - one for winter, and one for summer. I could do synthetic now, but I just can't afford or justify a $40-60 synthetic change at a lube place every 2-3 months, versus $20-25 for regular dino, especially when for this OCI, a dino is almost as good as a synthetic. Anyone else have this kind of problem, because of warranty or place they live can't do their OC of choice? Or do most BITOGers make sure they can do their own if they want? Do most of you do your own OC, or do you have it done somewhere?