Synthetic or regular?


#1

I have a newly rebuilt Chevy 454. The break-in 750 miles are complete. Any recommendations as to whether the new oil should be synthetic or regular?


#2

Suggest Amsoil or Redline 100% pure synthetic. NOT Castrol Syntech(is a crack crude oil false synthetic. Mobil 1 ok in a pinch. Amsoil has great filters too. Longer times (10-20k mi) between chngs. Can have lubes analysed by lab to see how ur engine is doing ! Crude oil says it all…crude as a modern lube today and doesn’t last as long.


#3

The engineers who designed and tested this engine assumed that users would be using crude (regular) oil. They have found this product to be satisfactory as a lubricant. There is no need to use synthetic oil; it’s primarily a matter of discussion between you and your wallet.


#4

either is fine, to justify the synthetic cost you need to extnd the change interval whihc is fine depends on which one lets you sleep at night