Good morning everyone. We are about to take delivery of a used 2013 Dodge Dart with a 2.0L I-4 with only 15k miles. Got a GREAT deal on this baby. While I'm not a huge Chrysler fan (was burnt back in the 90s by a POS Intrepid)this car seems very solid. Research indicates it's an Alfa Romeo re-badged. The manual states 0w-20 is recommended, however 5w-20 is acceptable if 0w is not available (I live in the south, 0w-20 is hard to find). A mechanic friend of mine told me that 0w-20 oils are synthetic whereas 5w-20 won't necessarily be. Is this correct? If so is Dodge recommending a synthetic oil for this motor? Any input would be appreciated. Would 5w-30 would be pushing it? This is the first car I've owned that specified a 20 weight oil.