From the Valvoline SynPower page..
What are the benefits SynPower delivers over conventional motor oils?
Compared to conventional motor oil, SynPower full synthetic motor oil offers easier cold starting, quicker flow upon engine start-up, quicker heat dissipation and better high-temperature properties.
Can I extend my drain interval if i use SynPower? How often do I need to change my oil when i use SynPower? If I can't go longer on oil changes, then what's the advantage?
Although it is true that synthetic oils can hold up for longer periods of time, the additives will still eventually wear out and the oil will become dirty with engine contaminants. Following the recommended change intervals for oil and filter outlined in your car's owners' manual with SynPower Motor Oil, will result in a clean engine and help combat engine wear which ultimately will help keep your engine running better longer.
Is it okay to mix synthetics and conventional oils?
Some of the first synthetics offered were formulated with high levels of ester that were incompatible with conventional oils. Today's modern synthetics are designed to be compatible with these conventional mineral oils. So, if you have synthetic oil in your car and would like to top-off with conventional oil, that's okay. SynPower is fully compatible with all conventional motor oils, as well as other leading synthetic oils.
Is SynPower a full synthetic? Is SynPower motor oil PAO or ester based? Does it require a special filter?
Yes, SynPower is 100% synthetic. Synpower uses a proprietary combination of various types of synthetic base oils to obtain optimum performance.
No, a special oil filter is not required with Synpower.
Can I use SynPower motor oil with alcohol/ethanol fuels?
Yes, SynPower can be used in fuels containing alcohols.
Is SynPower motor oil okay for my diesel truck?
Valvoline SynPower is designed for use in light duty gasoline trucks, as well as gasoline and diesel passenger vehicles. Diesel engines in trucks require API CG-4/CH-4 type oil. For premium performance, Valvoline Premium Blue 2000 would be recommended.
Can I use SynPower motor oil in my motorcycle that has a wet clutch?
No. SynPower is a highly friction modified oil and is not designed for wet clutches.
Does SynPower motor oil contain Teflon?
No.
Can I use SynPower in an older vehicle?
Yes. SynPower has been tested with various seal materials by meeting API SL/SJ and preceding categories recommended for older vehicles. Or yes, SynPower has a proper balance of synthetic base oils in formula not to be harmful to seals or gaskets in pre-1980 vehicles.
Once I switch to synthetics, can I ever switch back to conventional or synthetic blend oils?
Yes.