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synthetic oil

  1. Royal Purple
    Royal Purple is releasing a new line of motor oil aimed at the street/performance enthusiast market. For several years, the American Petroleum Institute (API) has been reducing the maximum limits of common anti-wear zinc/phosphorus anti-wear additives in motor oils via their self-governed...
  2. V6 Engines
    Last week I purchased a 2008 Touring AWD 3.5L with 65,000 miles. I changed the oil and oil type yesterday. The previous owner used to use Valvoline Dura Blend 10W-30, which is a combo of synthetic and regular oil. My local shop put in regular shell oil 10W-30. As soon as we started the car, I...