Perfectly normal with fresh oil in these trucks. They use the oil to fire the injectors. The fresher the betterOk, so the odometer told me the time had came to change the oil. Well I neglected to do it when I should have and the result was I went over about 1000 miles, meaning I went 6K. So I did the oil change and immediately after I started my truck I noticed it started quicker and the engine was quieter? Any idea why this would be?