My aunt has a 2013 escape with the 1.6 ecoboost, she asked me to change her oil, which I will do tomorrow. She picked up some Pennzoil Conventional 5w20 and a Napa Gold 1348. Pennzoil Conventional 5w20 meets the Ford WSS-M2C945-A spec that this engine requires, should the Pennzoil conventional be ok to use or should I get some synthetic oil?