What weight oil for this built Chevy motor.

[atikovi]

Picked this up a few years ago and only put a couple hundred miles on it, so its time for an oil change. No idea what all was done other than what you see here. Would 20W50 be the way to go? I don't expect to drive it below 40°F, and it's hard enough to start below 60° as it has no choke.

 

[mrsilv04]

If mine, I'd use Rotella 15w40 without a second thought.

 

[RooflessVW]

VR1 10W-30

 

[JohnnyJohnson]

I would go with Quaker State or Mobil 1 5W-40.

 

[DriveHard]

I would run 5w-40
Step #1 - remove carb and put auto learning fuel injection system on it.

 

[atikovi]

So far we have 5W40, 10W30 and 15W40. Glad everybody is in agreement. Now where is my 3 headed coin?

 

[High Performance Lubricants]

I run 5w40 in this built Chevy 410. 940 hp 9000 RPM’s

 

[Brian123]

View attachment 131989

I run 5w40 in this built Chevy 410. 940 hp 9000 RPM’s

OK, what Camshaft is in here, and what are the specs? I am guessing this is a roller cam? What cylinder heads are on this motor? This is probably not a street engine. LOL

 

[SubieRubyRoo]

View attachment 131989

I run 5w40 in this built Chevy 410. 940 hp 9000 RPM’s

Dave how do you end up with the best toys?? What’s in your Mustang?

 

[Malo83]

Run 10w30 in my small block year round.

 

[High Performance Lubricants]

Not my intention to hijack a thread. The point was 5w40 (with the right additives) in a properly built small block will get you pretty far. 5w30, 10w30 5w40, 10w40, and 15w40 will all be good choices based on climate. These are absolutely solid roller. Quite big cams for the winged cars as many tracks they run flat footed

 

[OVERKILL]

5W-40 or 0W-40 have always been my choice for smallblocks. I run 5W-40 (Delvac 1) in our 351W in our boat, I ran 0W-40 in my 302 and its performance in many built 302's was excellent.

 

[JeffKeryk]

If you are running a flat tappet camshaft with high spring pressure, run Castrol GTX Classic 20-50.
If it's a roller cam, 10w30 or 10w40 synthetic. Or just about anything. A roller cam does not need a high zinc oil.

 

[SubieRubyRoo]

5w50 HPL. Covers all your bases.

 

[JohnnyJohnson]

So far we have 5W40, 10W30 and 15W40. Glad everybody is in agreement. Now where is my 3 headed coin?

The one that says cheapest price wins?

 

[40Deluxe]

Looks similar to my 350 in my street rod, I use 10w30 and one bottle of zinc additive

 

[blufeb95]

I'd use Mobil1 15W50, but maybe I'm biased because I still have several cases of it in my garage from the Walmart incident last summer.

 

[demarpaint]

Any good 0W40 or 5W40 should do fine.

 

[wag123]

It really depends on how they setup the clearances when they built it.
Without knowing what they are, synthetic 15W-40 with a ZDDP additive would be my choice if you aren't planning to run it in cold weather.

 

[wpod]

Not my intention to hijack a thread. The point was 5w40 (with the right additives) in a properly built small block will get you pretty far. 5w30, 10w30 5w40, 10w40, and 15w40 will all be good choices based on climate. These are absolutely solid roller. Quite big cams for the winged cars as many tracks they run flat footed

Wing cars are amazing to watch.