the_unihusker

if i slap aS/C on my '07 GT, would5W-20 synthetic oil suffice or would i need to go to thicker weight(i.e...5W-30 etc)?

GotMunchies?

To be honest, I think (me and a few others, this isn't a universal opinion), it would be a good idea to go for the higher viscosity oil anyways.

Apparently in the South American continents, the manual reccomends 5w-30. The reasoning behind this is that in the US, Ford uses 5w-20 to eek out some extra gas mileage. Or something.

Either way, I use 5w-30 as my car sees relatively little highway use and a fair bit of abuse.

If you really want to be safe, talk to the manufacturer of the Supercharger and see what they have to say.

xz06

I asked my Service Manager at the Roush dealer,and he said 5w20.or void the warranty.My supercharger was dealer installed.

JimIII@JDM

on all of the cars we have ever done we suggest 5w20 motorcraft syn blend

Dex

So they test the oil's viscosity at the dealer now? give me a break

they wont know what you put in the engine

fordfanboy

Jeez, you get around the internet more than me Jim...lol Welcome to the site BTW.

I agree. On my car I run Torco 5w20 syn...

CK

06Saleen3V

I run 5w-30 anyway

Meangreen1200

5-20W

2k6silvergt

5w-20. Called whipple to see what they recommend and they said just to stick with the same weight.