Advice on plugs and oil needed
German Castrol Syntec 0w-30 seems to be the most popular oil for our LS1s, you can find it at select Autozones (might have to call a few before you find one that actually stocks it). Next would be Mobil One 0w-40.
As for oil, I use Mobil Clean 5000, I dont care for synthetic. I am at the firm belief I'll be building a bigger motor by the time I wipe out the bearings.



