My 312 yblock is in the process of being rebuilt. Should I use any additives during engine break in? Should I continue using additives after break in?

i sent 2 members pages of info similar engineer in ca made tests on every oil for sale in the us. but i goes they failed to pass it on,or possibly the sheep ethic surpassed teck info,some never learn. so i say don't wast time trying to educate a sheep

I seem to recall that not too long ago Rotella-T 15w40 (not the Synthetic Version) was One Oil that was acceptable for use in Y-Block Engines. Personally I have been using it for 10 Years. It does still have sufficient ZDDP  Content where many other HD Diesel Oils no longer have it. I have also read that it is rated for use in Gas Engines. Why is it no longer considered acceptable for use in Y-Blocks? It does not require the addition of the Zinc that has been discussed in this Topic. 

  

Rotella is still a go to oil last I heard.  Just hard to find in some places.  For me no local place stocks Rotella-T they have to order it.  So my option is to hit up the local oreillys and get the 5 quarts I need in Valvoline VR1 20W50 conventional as they keep that in stock and its a high zinc oil designed with racing in mind but is also compatible on street vehicles.  I don't think its a full on race oil the bottle seems to indicate it has the benefits of race oil with high zinc levels but is still a regular motor oil.


1956 Ford Fairlane Town Sedan - 292 Y8 - Ford-O-Matic - 155,000 mi

Here's my concern (also IMO)-

The Valvoline VR1 Racing and other racing oils not intended for passenger vehicles contain additional additives for increased horsepower and reduced friction on metal parts, provide extra wear protection for high compression/higher horsepower engines, and include fewer detergents than regular conventional motor oils.

So knowing this and having a high dollar engine (most likely no PCV also), I would keep a close watch on the crankcase. Maybe even an oil analysis occasionally. But the oils designed for today's engine ain't gonna cut it in a flat tappet engine (IMO).

____________________________

which is why I check my oil quite a bit.  its a little higher on the stick than it was but this oil is about 2 years old and being a draft tube setup with no real street driving the condensation is only what can puff out during running.  Once I start to drive the car I will make sure there is fresh oil and filter in the car.


1956 Ford Fairlane Town Sedan - 292 Y8 - Ford-O-Matic - 155,000 mi

Have You checked your local Walmart? As far as I know they stock it and Price is very good.

  

I am using VR1.  I think I'll skip the additive next time.  Thanks.

googol shell rotella t you will find lots of info, i could find no recommended use for gas engines,especially old ones