The 2015 ford taurus uses sae 5w-30 oil whenever you need to change it. ford also recommends that you use full synthetic oil. there are two different oil options that are on the market these days synthetic and conventional. synthetic oil is newer and engineered to give you better performance and longer life than standard petroleum-based conventional. this means that you will need less frequent oil changes. you can change it every 7,500 miles with synthetic and every 3,500 to 5,000 miles with conventional. i recommend checking your oil at least once a month. you will want to inspect it to make sure that it is full and free from damage and debris in it.
The type of oil for 2015 ford taurus varies by the trim levels due to the differences in the engines. for example, the recommended oil viscosity for 4-cylinder models is 5w-30. the recommendation for 6-cylinder models is 5w-20.