I run synthetic oil. Yes, it's much more expensive but it's more expensive because it's better for my car, and holds it's properties longer. Especially if you do a lot of city driving. So, whether you change your own or go to the station, buy the top of the line oil filter, run synthetic and change your oil every 6 months instead three, or every 6,000 miles instead of 3,000. If your budget is so tight that you can't afford maybe losing about $100.00 per year over going cheap by doing that, maybe buy 4 less bottles of vodka, or see 4 less movies at the theater. Whatever fires your retros. That's once every three months to not do something you never think about anyway. Is it that hard? If we are all going to get so conservative minded, what I've seen here and elsewhere is excuses for why oil changes don't increase like gas prices. It's still oil. Right there is an overall cheaper way to cut down on oil usage. How many cars and trucks are on the road in the US? Well, when you are wtching the bottom line for a major railroad or trucking company, those cents add up. When you are looking at the SUV in your driveway, where is the impact? I keep hearing all this conversation on alternative sources. You already have one, but it's not sexy like "gas prices". I'm too lazy to look at how much petroleum production is devoted to commercial lubes, but I'm pretty sure it isn't insignificant. When you are talking millions and billions of gallons or bbls, 5-10% isn't insignificant.