how often do i have to change synthetic oil?
Mobil 1 Extended Performance synthetic oil is recommended for oil change intervals up to 15,000 miles or one year, whichever occurs first. Thatâs roughly FIVE TIMES longer than conventional oil change wisdom recommends. Thatâs massive. Imagine the savings from both the actual oil and the change procedure costs. ELF: You can run a conventional oil 5K miles but you should be able to run a synthetic oil 7500 to 10000 miles.