When to switch to Synthetic?

[spidartanks]

I have a brand new 07 LTZ Avy and want to keep her for a long long time.
i run synthecic 5w 50 in my mustang and was wonering first off what grade synthetic to run? and when to make the change?

i plan on making my first oil change at 3000 km's to get rid of the metal parts that may be floating around?

i do live in canada so weather is extrem from -20 to plus 40 -  should it be wise to use different grades of synthetic for the weather?


thanks for any advice here

 

[escalanche]

you can switch to synthetic any time you want regarless the mileage, in case you don't know, corvette z06  and cadillacs V series come with mobil 1 synthetic from factory, so you do the math , go ahead and change to synthetic

 

[farmguy]

Switch to synthetic at the first oil change. Also consider switching to synthetic tranny fluid at the same time. The Diff has synthetic in it from the factory.

 

[2002AVA]

The tranny and transfer case all come with synthetic. The only thing that does not is the engine and front diff. So change to Synthetic and use the 5w-30 that is recommended. I live in Idaho and we very from -20 to 110. I have been using Syn since day 1 of buying my Av. I also use it in all my other vehicles.
My Datsun 78 280Z had 386k on Syn when I sold her, and she still ran awesome.


Shane

 

[jimbo53188]

the diff's come from the factory with syn. oil already.the transfer case has special GM only fluid,the trans uses dexron 3 or 4,but it is still petroleum based so swapping to a true sythetic trans fluid is beneficial,the engine will also benefit just stick with the viscosity in your owners manual,you can change them all now,there's a myth out there that syn's don't let engine rings seat etc. the only reason not to run syn's from the get go is cost,should that engine have issues upon statup.

 

[AV4fun]

I made the switch late hehehehe at 32,xxx miles. Im using Royal Purple now.

 

[jimbo53188]

royal purple and amsoil are the best two snythetics out there, still 100% synthetic