A few weeks ago I purchased a new 2010 Mitsubishi Lancer ES (2.0L non-turbo) with 100 miles on the odometer. The manual "recommends" 5W20 oil throughout all temperature ranges, with no suggestion for alternate oil for higher temperatures or driving conditions. For the turbo model, there are multiple oil recommendations depending on temperature, etc. I currently live in Illinois but will be moving to Texas in a few months. I have to do the ~1000 mile drive there and back several times a few times and wonder if 5W20 is still the best oil to use. Thanks in advance.