Which oil?

[koosh]

Newly built 493 stroker, about 1 hour running on test stand….
Next oil change-

Lucas High Zinc hot rod 10w-40, or 20w-50?

 

[RemCharger]

What kind of lifters. Specifically

 

[ruffcut]

I use 20w50 in both my strokers and 15w40 diesel oil in a 413

 

[dadsbee]

What did you use for the dyno run and were you happy with the oil pressure.......

 

[R413]

What is the piston to cylinder wall clearance?
This is the biggest factor in what weight oil to use.

What is the bearing clearance?

 

[WileE]

 

[WileE]

For higher viscosity,

 

[WileE]

If engine does not behave, then try

 

[eldubb440]

 

[Some Car Guy]

20w-50 will be hard to flow when cold. What does your builder say?

 

[WileE]

View attachment 1819861

 

[Runner 68]

Oil recommendations are like @ss holes, everyone has one and they all stink, including mine.
Ran the Lucas break in oil (dyno break in then dumped it) then ran it for the first 500 miles then switched to the Lucas High Zinc Hot Rod 10w-40 in my 500" stroker, BIG solid flat tappet cam.
Cut the filters open after each change and inspect. Any problems will be obvious.

 

[Daniel Brunner]

I use 20w60 with a huge amount of zinc on a built 318. I know, thick like cold honey and sounds way off but it works perfect on mine

 

[Mbrew]

Newly built 493 stroker, about 1 hour running on test stand….
Next oil change-

Lucas High Zinc hot rod 10w-40, or 20w-50?

Imo i say 10/30 too heavy an oil robs power.

 

[Gary Gaz]

It takes almost 20 mins for the oil to get to its full operating temperature, so need to factor how thin it will be warm, any 30 wt oil should be fine, I use Penrite 20w-60 with zinc in my fresh 440, with high volume pump with std spring and its about 70psi warm, 80 odd cold, according to the gauge.