However, the additive package (at least in our oil) is exactly the same. So, while the oil itself will stand up better to longer life, the additive package will be used up at the same rate.
Thanks for the info. I do have a question regarding the additive package.
I converted to synthetic for the "higher quality, cold temp start up properties and the longer change intervals."
For me, the longer change intervals may not apply due to the shorter driving distances I do. It may take me 6 months to rack up 4 - 5,000 miles.
I know the recommended change interval for conventional oil is 3 months or 3,000 miles. What should the realistic oil change interval be for synthetic oil? Does the "additive package" allow for longer change intervals regarding time or is the longer change intervals only regarding miles?