Super Quick Question...37 Ford.

[don's 37]

Just a quick question. I'm ready to start up my 1937 Ford fordor with a rebuilt engine and take it for a ride and it's break-in. Right now I've got Quaker State 10W-40 with the Lucas zinc additive in it. Should I go ahead and use what I have or switch over to a 20W-50 Castrol, etc. brand with the zinc already in it? I know a lot of you folks like the 20W-50. Thanks!

 

[rotorwrench]

Personally, I always use straight grade mineral (non-detergent) oil for break in but engines will probably break in with just about any oil in them as long as a good assembly lube was used on the cam and cast iron rings are on the pistons. With chrome rings, non-detergent would be better.

 

[FL&WVMIKE]

don's 37 ...............................
It won't make much difference on which oil you start it up with. You should drain out that oil after about 50 miles, to get rid of little metal shavings.
MIKE