BoneStock

Hey guys! I have a 2012 gmc sierra with about 1100 miles. Can I go ahead and switch to synthetic, and get the break-in oil out? With the mileage on the vehicle, will the rings be seated enough yet? I have done quite a bit of searching and never really got a straight answer on this. Thanks for the input.

bww3588

iTrader: (49)

Engines are broken in before they leave the factory. I'd give it till around 2k miles. No reason to waste perfectly good oil.

wildcamaro

iTrader: (15)

Yep I would use Mobil 1 5w-30...it is "dexos" approved which is what GM uses

rsz288

Normally the LS engines come from the factory with 5W-30 synthetic.

Dyno Junkie

At 500km's (~300miles) oil was changed for Castrol Edge 10w-60.