Oil for Nitrous Big Block Chevy Race Motor

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McWidget

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Sep 22, 2025
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454 big block chevy for drag racing. Flat tappet cam, hydraulic lifters. I did the break in with Lucas Break In Oil SAE 30. What should I use for actual racing? I have looked at both Royal Purple 10w30 and VR1 10w30. Motor will do lots of 6000 rpm pulls. Nitrous will be rare (grudge races only).

I have enough new Lucas break in oil for another oil change. Might change the oil and run that while I put 100 or so break in miles on it now that the cam is broke in and rings are seated.

Let me know any other info you need! Have full motor build sheet.
 
Just curious….why hydraulic flat tappet cam for a race engine? Oil type aside, mechanical lifters will last under those RPM blasts. Of course roller cam-lifters is the best solution but cost is triple. What valve spring pressures?
 
What oil temps are you seeing? How much oil pressure? Approx hp?, Do you expect to periodically tear it down to check clearances, the valvetrain, etc?
 
What fuel? Is it dedicated drag race only or will it see some street use?

I recommend reaching out to High Performance Lubricants with your engine specs. They can make you an oil specific to your application. Their oils are more stout than you'll find from anywhere else.

Otherwise, I would look at other boutique options. For drag racing use only, a 30 grade would be good. You wouldn't benefit from a 40 or 50 grade unless you have really wide bearing clearance and/or let the oil get hot. If it sees regular street use at full operating temp, that changes things. If you're using E85/98 or M1, where fuel dilution could be a concern, that changes things.

Amsoil Dominator 10W-30
Amsoil Z-Rod 10W-30
Driven LS30 5W-30
Driven XP3 10W-30
Driven GP1 10W-30
Red Line HP 5W-30 or 10W-30
Red Line Race 10W-30

I'm not a fan of Royal Purple, not since the Calumet acquisition stripped it of everything that made the brand unique. Their XPR line is okay, but the rest is essentially just Gucci Valvoline. Speaking of Valvoline, VR1 synthetic 10W-30 is a good choice and much better than the conventional version. The conventional VR1 is pretty much just regular white bottle Valvoline with +80% more ZDDP. In contrast, the synthetic VR1 has a completely different additive package with more ZDDP, better foam prevention, is more shear stable, and has multiple friction modifiers working in synergy. The boutique brands above have the same approach to formulating as synthetic VR1 but taken further.
 
addyguy said:
Would not use a 30-weight in a racing BBC.
A relatively inexpensive option would be a full-synthetic 15W-40 HDEO like Rotella T6 15W-40 or Delvac Extreme 15W-40.
Click to expand...

He's drag racing. The oil isn't likely to exceed 150°F. A 30 grade is fine and preferred. All a 40 grade will do is rob power.

A 30 grade is even on the heavy side for this style of racing. I use a 0W-12 in my drag engine.
 
userfriendly said:
That would be the winter grade.
Click to expand...
Winter grade is related to pumpability at low temperatures, not operating viscosity. If the operating temperature is <180F then it's hard to imagine a 30 grade isn't sufficient, unless it's something more exotic like an aluminum connecting rod or some very loose bearings.

Some references:

https://www.enginelabs.com/news/what-i-learned-today-bearing-clearances-vs-oil-viscosities/
https://www.k1technologies.com/k1-blog/bearing-clearance-and-oil-viscosity-explained/
 
VR1 is likely the most race proven oil in the USA. I see no reason to run anything other than VR1. This is not a daily driver, nor should it be a long OCI car.

Conventional or synthetic, either one would be my choice

Mobil 1 15w50 would be another
 
McWidget said:
454 big block chevy for drag racing. Flat tappet cam, hydraulic lifters. I did the break in with Lucas Break In Oil SAE 30. What should I use for actual racing? I have looked at both Royal Purple 10w30 and VR1 10w30. Motor will do lots of 6000 rpm pulls. Nitrous will be rare (grudge races only).

I have enough new Lucas break in oil for another oil change. Might change the oil and run that while I put 100 or so break in miles on it now that the cam is broke in and rings are seated.

Let me know any other info you need! Have full motor build sheet.
Click to expand...
My uncles always used valvoline 20w50 racing oil. They had two pro mod cars 1/8th mile. 706 and 738 with three fogger kits. Both eagle racing engines. They also had a stock deck 600 that looked just like a 454 with a dual stage plate kit and it ran consistent 5.60s in a full steel 69 camaro with ladder bars. I ran it in my 434 standard deck SBC with a big shot plate kit. Zero issues ever
 
RDY4WAR said:
He's drag racing. The oil isn't likely to exceed 150°F. A 30 grade is fine and preferred. All a 40 grade will do is rob power.

A 30 grade is even on the heavy side for this style of racing. I use a 0W-12 in my drag engine.
Click to expand...
Once the winning rounds occur, the hot lapping starts and the engine doesn’t have sufficient time to cool down.
In bracket racing, you try and run your dial, so a few horsepower loss from thicker oil than necessary won’t change the outcome.
consistency wins races

The thread starter stated that the engine has a FT camshaft. Base oil viscosity is the first line of protection.
Personally I’d migrate to a high Zn SAE 30 or 40 for highly loaded valve trains. But that’s just me.
 
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