Just had my 7500 mile service and oil change in my 2003 Accord LX V6. They put Mobil 1 oil in as well as the wynn's supreme plus oil additive. All this cost 9.00. Pretty darn expensive. I think I will skip the wynn's additive in the future and save .00. My understanding is that Mobil 1 is synthetic oil. This is no doubt more expensive than conventional oil. Is synthetic really any better or should I just go to a jiffy lube and get whatever oil they happen to use and only pay .00 or less?