I have worked as a svc adviser at the same Acura dlr for over 14 years. I have regular loyal customers that return for all oil changes and maintenance and I keep their records. Most of the Acura/Honda engines need a periodic valve adjustment,let me tell you that with the valve cover off of a engine with more than 60 thousand miles on it there is a HUGE difference in how clean it is and the noise and oil consumption between people that change every 3000 miles versus every 5000 miles versus every 7500 miles. Although we don't push 3000 mile oil changes to our customers,we gently recommend 5000,but they can go up to 7500-10,000 miles without voiding warranty depending on the year and model. A combustion engine produces contaminates and some blow by that ends up in the oil,also moisture from short trips and acids wich can contaminate the oil. I use synthetic 5-20 amsoil and change every 3000-4000 miles with a napa gold or fram filter.
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