Hi Guy .
DO NOT USE SYNTHETIC TO BREAK IN A NEW ENGINE The rings won t seat and it
will puke oil out the exhast. I use Castrol GTX 10W40 or20W50 depending on
temp. Run it 100 miles then change oil and filter andrive at least 1000mi
before you change again You can start synthetic after 3000mi
On Thu, Jul 8, 2010 at 8:55 PM, Would U. Believe <mcdangerous@verizon.net>wrote:
> I am trying to figure out the best choice of dino oil for the 289 engine.
> Because the engine is freshly rebuilt and needs to be run in, I don't want
> to use synthetic (too slippery). What grade oil are you all using, 20W50?
> Thanks!
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