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SignUp Now!salvageV6 said:3,000 - 4,000 miles.
Usually closer to 3000.
Filter and oil both cars.
I change my oil every time I take something on the engine apart or if it sets for too long. So about every 100-500 miles. :frown: I guess when I don't have it apart I'll go 1500-2000 miles depending on how much alky I burn.
For a street car I agree but if you run alky injection or race the car then you should change it more often. So I change mine more often.Wow you guys like changing oil! If you have a clean burning motor with tight piston to wall clearance and little blowby or leakdown, and drive at operating temp for longer than 15 minutes, you can easily go 5000-8000 miles on the oil. But it needs to be a good synthetic and a good filter. I always went 8000-10,000 miles on my cobra with royal purple. The motor burned emissions like a new honda and had perfect compression after 5 years and 60,000 miles of abuse...and most of my trips were only about 15 minutes. All other oils would drain out looking terrible, but the RP drained out looking new, so I stuck with it. The whole inside of the motor looked brand new when I sold it. I used to fire it up in the dead of winter and without even warming it up, I'd bounce it off the rev limiter at 7500rpm through the gears...never any damage. When I had the blower on it, I changed it every 5000. Theoretically, you can go 20,000 miles on a good synthetic, as long as you change the filter every 3000-5,000. My personal favorites are RP and Redline. I know redline is one of the best, after we used it in all our road racing cars and the engines would tear down after an entire season, without a sign that the engine was ever even fired up...and they were the top placing cars in their class.
Amsoil was the second synthetic to come around, a long time back. But alot of independent tests have shown it to not be as good as they like to think....its a good oil, but not the best.