Has anyone here used Redline 0W-40? I've pretty much lost interest in boutique oils and have been sticking to the $30/jug higher end Walmart oils (PUP, ESP, EP etc) but I came across this oil from Redline. I've used Redline 5W-30 and I did notice it quieted valvetrain noise. I can't find much info on people's experience with this oil. Anybody running this stuff? Any UOAs?
Redline 0W-40
- Thread starter carl1963
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- Feb 3, 2025
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The 5W-30 is quite popular with the Hemi crowd on the Ram forums. I have no doubt it's quality oil.
What car, what engine. I've used it without issue on a few of my high HP cars.....it's overkill for most applications
its popular in the ram TRX world, i got some coming tomorrow thats gonna go in my 5.7 hemi. Looks like good stuff
I've been driving Subaru STIs (several) for almost 20 years now, reliably, no issues.
I started off with M1 0w40 and it was good, no issues, I did start burning oil, but that was with MILES.
Once I started modifying I moved to the Redline 0w40 you're mentioning, and it was great! Heck, that car sustained 165mph for extended periods, no issues.
But so far, ever since 2018 that I built the motor and threw a bigger turbo at it, I've just stuck to Rotella T6 5w40 and it has also been flawless.
I started off with M1 0w40 and it was good, no issues, I did start burning oil, but that was with MILES.
Once I started modifying I moved to the Redline 0w40 you're mentioning, and it was great! Heck, that car sustained 165mph for extended periods, no issues.
But so far, ever since 2018 that I built the motor and threw a bigger turbo at it, I've just stuck to Rotella T6 5w40 and it has also been flawless.
Not the exact answer to your question but unless you're outside the temp specs, which I can't imagine. I'd stick with a 5w over a 0w oil anyday.
Can you elaborate on this? The difference in spec for their 0w40 and 5w40 is minimal. Doesn't 0W oil have better flow regardless of temp?
Interesting take... Why?
edy and other's here can give you a much better explanation than me. Do a little searching on google with something like "0w30 vs 5w30 bobistheoilguy". I'll copy and paste a post that makes a lot of sense.
My basic understanding is a 0w simply isn't as stout as a 5w because of the mount of VII and lower base stock needed to make it. It seems to shear much more and has higher NOAK. A Red Line 5w30 seems to be an absolutely phenomenal oil that many hemi owners tout as clearing out their knock. I've ran it in my B58 and it was the smoothest oil I've run. I have Liqui Moly Molygen 5w40 I'm running in a farm truck and Motul 300V 5w30 for my B58 next just because 1) I absolutely hate the Red Line bottles and 2) I do FCPs deal. The Red Line bottles are so bad I can't get the little tiny tabs off while wearing gloves and recovery the oil into those bottles is such an immense pain. Baring that I still considering it my favorite oil out there.
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Yes, and as I've shown before, a narrower spread doesn't necessarily mean heavier basestocks are used, they may just use cheaper basestocks and the same or more VII.
Some brands’ lineups vary the basestock types used across the viscosity grades and some do not or if they do, it is not a big difference. In the latter cases, their 0W-X tends to be more volatile than their 5W-X oil. Likewise for their 5W-X compared to 10W-X. The truth is what people dislike: it depends. The only oils I’ve tested in recent years that is a case of the former is M1 ESP 0W-30 and ESP 5W-30. I think the former oil’s ester content is mostly or entirely what makes it less volatile. Castrol Euro 0W-30 and Euro 5W-40 seems to be another case of the 0W-X (quite a bit of PAO) being less volatile than the 5W-X (no PAO).
For Red Line, their 5W-30 is less volatile than their 0W-40. Of course the decision isn’t all about volatility. I would choose a great oil from a store shelf for this application, not Red Line.
For Red Line, their 5W-30 is less volatile than their 0W-40. Of course the decision isn’t all about volatility. I would choose a great oil from a store shelf for this application, not Red Line.
What 0w30 has a lower NOAK than their 5w30?
I suspect that Castrol Euro Edge 0W-30 is less volatile than Castrol Edge 5W-30, but it is somewhat an unfair comparison because the 0W-30 is considerably more viscous at 100 C and they are not exactly in the same Castrol lineup. It’s a shame that so few manufacturers list Noack values. They want to keep us in the dark.
I've never seen NOAK reported by any blender.
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Nth Of A Kind? I see it all of the time referenced for nuclear builds
