With either Black or Pintos you can also just empty a can into a saucepan, add garlic, boil, then simmer until most of the water is gone, and use a potato masher to smash them, if you time it right the flavor and consistency are very close to refried without the oil, been doing it for years.

Tom, great article. I purchased a 2014 MBZ E250 blutec cpo with 27k miles. They included scheduled maintenance up to and including the 40k service and extended the warranty. My 4th cpo, all good experiences.