Burrito

01 2500HD 4X4 @ 120,000 miles. Has cold start knock. It develped a bad case of spark knock around 100,000, but I began running 93 octane fuel and it only does it under heavy acceleration now. Burns about a quart of oil every 3000 miles, but that's in Dallas stop and go traffic everyday . I just moved away from Dallas, so my driving habits will change and I bet it won't burn that much oil anymore. Overall, I'm 90% happy with the engine.