Best oil to use

[57larry]

what's the best brand and weight of oil should I use in a fresh rebuilt Chevy 350? thanks, Larry

[lofat46]

what's the best brand and weight of oil should I use in a fresh rebuilt Chevy 350? thanks, Larry

Do you have a flat tappet or roller tappet cam?  If a roller cam you can use any oil. If a flat tappet you'll have to use an oil with zinc in it for the life of the engine or add a zinc additive to other oil. I use 10w-30 Lucas Hot Rod and Muscle Car oil which has the zinc in it already. It comes in most common weights, 10-30, 10-40, 20-50. It is petroleum based, not synthetic.

[Ohio Blue Tip]

I use Brad Penn 30W Break-in-oil on all my new or rebuilt engines, then I use Mobil 1 in every thing, even the lawn mowers.
Never had a failure, so it works for me.

[chimp koose]

my brother used to use Castrol gtx oil in a car he got from new in '85. I tore it down to do mods after about 100000 KM and you could have eaten out of the valve cover. Must be a high detergent oil as there was absolutely NO varnish in it . insides looked like it just came out of the cleaning vat. This was a carbureted engine , 2.2L dodge

[57larry]

I use a name brand 10W30 oil plus Lucas zinc plus additive

[57larry]

gonna go with a straight 30 wt oil plus Lucas Zinc