Redline 5w50

[Doc Oc]

Search didn't turn up much...just wondering if anyone is running it and if so, impressions? Looks like a good add-pack and the viscosity is ideal for what I am looking for. I was thinking of running a 50/50 blend of it and rl 0w40 in the winter and just straight 5/50 in summer.

[admranger]

I'm interested in this too. (sorry Doc, no help...)

[kawasaki00]

Just run one or the other, mixing these two is a waste of time.

[Doc Oc]

Thanks. I'm trying to find an oil with more cold flow than tws but still thick enough to keep things relatively quiet once hot. Currently running out euro 5/40 and it is a bit noisy once up to temp. Any experience sith either oil? After doing some research last night it seems that RL oxidizes pretty quickly and the tbn drops faster than most other oils which is putting me off a bit.

[oolas3]

FWIW, RL isn't that well received over at bob is the oil guy forums.

Why not mix the BMW 0w40 with the BMW 10w-60? You should be able to custom blend what you're looking for.

[kawasaki00]

Originally Posted by Doc Oc

Thanks. I'm trying to find an oil with more cold flow than tws but still thick enough to keep things relatively quiet once hot. Currently running out euro 5/40 and it is a bit noisy once up to temp. Any experience sith either oil? After doing some research last night it seems that RL oxidizes pretty quickly and the tbn drops faster than most other oils which is putting me off a bit.

People make their own choices but you will not find redline in any of my stuff. Thats all I will say about that. Are you talking about the Pennzoil, Ultra Euro 5-40?

Originally Posted by m3m3mr

FWIW, RL isn't that well received over at bob is the oil guy forums.

Why not mix the BMW 0w40 with the BMW 10w-60? You should be able to custom blend what you're looking for.

Mix 0-40 and 15-50 if you want. Wouldn't mix the 10-60 with mobil

[oolas3]

Originally Posted by kawasaki00

People make their own choices but you will not find redline in any of my stuff. Thats all I will say about that.

Mix 0-40 and 15-50 if you want. Wouldn't mix the 10-60 with mobil

BMW now has a 0-40. Agree shouldn't mix brands unless it's just a top off.

[squartus]

Originally Posted by Doc Oc

Thanks. I'm trying to find an oil with more cold flow than tws but still thick enough to keep things relatively quiet once hot. Currently running out euro 5/40 and it is a bit noisy once up to temp. Any experience sith either oil? After doing some research last night it seems that RL oxidizes pretty quickly and the tbn drops faster than most other oils which is putting me off a bit.

Odd, im running 5w40 Motul and have no increased engine noise at all over 10w60. Warms ups hell of alot faster and much smoother in the mornings.

[kawasaki00]

Originally Posted by m3m3mr

BMW now has a 0-40. Agree shouldn't mix brands unless it's just a top off.

The bmw is the same as Pennzoil ultra 0-40. You are correct not so much brands but base stock mixing is the real issue.

[Doc Oc]

Originally Posted by squartus

Odd, im running 5w40 Motul and have no increased engine noise at all over 10w60. Warms ups hell of alot faster and much smoother in the mornings.

It does warm up quicker and the car runs much better cold, no bucking or surging, but once it's hot, there's a lot more engine noise. You can't hear it from inside the car at all, and even at idle it isn't bad, but in a tunnel under load it's much louder now than with 10/60. I run the same set of tunnels quite often and am pretty tuned into the sound.

[Doc Oc]

Originally Posted by m3m3mr

FWIW, RL isn't that well received over at bob is the oil guy forums.

Why not mix the BMW 0w40 with the BMW 10w-60? You should be able to custom blend what you're looking for.

Yeah I know.....oxidation issues and wear metal increases....they go back and forth....not sure what to believe. Good tip on the bwm 0w40.

[Doc Oc]

Originally Posted by kawasaki00

People make their own choices but you will not find redline in any of my stuff. Thats all I will say about that. Are you talking about the Pennzoil, Ultra Euro 5-40?

Mix 0-40 and 15-50 if you want. Wouldn't mix the 10-60 with mobil

Yeah, my phones' spell check turned pu into out. C'mon, let us have it on Redline! I respect your opinion so if you say you wouldn't run it, I'm going to listen. Just wondering why?

Is the bmw 0w40 and 10/60 the same base stock? I like that option better.

[dparm]

Originally Posted by m3m3mr

FWIW, RL isn't that well received over at bob is the oil guy forums.

It's not that people don't like it, it's just that it's seen as an older chemistry that some think has since been surpassed. Note all of the subjective/opinion words in my previous sentence. It still has an objective/proven track record despite being "older".

I'd probably go for Red Line's 5w40 over the 5w50 simply because its operational viscosity (HTHS) of 4.4 is fairly close to what TWS shears down to.

The 0w40 isn't bad either.

Only way to know for sure would be to check oil pressure in operation and sample the oil.

Not to throw a wrench into things, but have you considered any of the Renewable Lube stuff? Also a group V-heavy basestock (plant esters) with impressive VI and modern add pack. I used to run their 0w30 in my Audi and was quite impressed with the analysis reports it generated. They do have a 5w40 that's quite stout and was initially developed for the Audi RS4.

[Leonardo629]

Doc, M1 5W50 from Amazon.com if PU 5W40 is not meeting your motoring needs. But a spread like that is going to shear just like TWS.

NAPA here in So. Cal also stocks M1 5W50.

[Doc Oc]

I did check out R. Lube but the hths on the 5/40 was 3.7 which is pretty similar to what I'm using now, but thanks for the suggestion. I'm not set on redline, they just have the thickest 0w40 I have seen. I'm really trying to experiment with some different viscosities to see what, if any effect it might have on my annoyingly loud cold start rattle and operating noise. I think/hope a 0w will pressurize the system quicker and help with the noise but I'd like something a little thicker than m1 which I've seen on uoa's as thin as 11.x at 100c. Redline is in the 14 range, a little closer to tws but still with the cold flow benefits of a 0w. Is there any other 0w40 out there as thick?

[Doc Oc]

Originally Posted by Leonardo629

Doc, M1 5W50 from Amazon.com if PU 5W40 is not meeting your motoring needs. But a spread like that is going to shear just like TWS.

NAPA here in So. Cal also stocks M1 5W50.

Thanks. I thought about that but thought I read here that it wasn't a great option for our engine? Or am I mistaken? UOA looks pretty good on it....nice additives, shears down to a 40 (14.43 cst)... is there any reason more people aren't running this?

[Leonardo629]

I guess you gotta ask yourself, why is thicker oil needed?

You are using the very same PU 5W40 that's factory fill for cars like F430/Scuderia/458 Italia/488GTB...which all rev higher (except 488) and produce more hp per liter.

Did you know M1 0W40 is the factory fill for McLaren MP4-12C and 650S? Why didn't McLaren choose something thicker for their exotics? They don't care about reliability?

[Doc Oc]

The difference is, none of those cars are spec'd for 10w60. They are using the proper, factory recommended fill. We are not. I'm not worried about not being protected by 5w40, most of the cars I've had used a 30 or 40 and some made over 600 hp. I just wonder why BMW specifies such a heavy oil and what are the ramifications, if any, of going lighter? Everyone jumped on the 0w bandwagon out of bearing failure fear, but I have never seen a serious discussion of what unintended consequences may arise from putting in a much thinner oil. There has to be a mechanical reason BMW specs tws.

[dparm]

Originally Posted by Doc Oc

I think/hope a 0w will pressurize the system quicker and help with the noise but I'd like something a little thicker than m1 which I've seen on uoa's as thin as 11.x at 100c. Redline is in the 14 range, a little closer to tws but still with the cold flow benefits of a 0w. Is there any other 0w40 out there as thick?

Kinematic viscosity at 100 C is not the best figure for approximating operational viscosity. The oil might be at that temperature in the sump, but in places like the bearings it will be far warmer.

Use the HTHSV to compare operational viscosity. That being said, here are some 0w40 HTHSV numbers:

Red Line: 4.0
Mobil 1: 3.8
Pennzoil Ultra: 3.7
Liqui-Moly Synthoil Energy: 3.6
Royal Purple: 3.6
Motul 300V: 3.9

You want as thin as possible, but as thick as necessary. Without an oil pressure gauge, it's just going to be an educated guess.

[pbonsalb]

I am going to get my hearing aids checked.

M1 0W40 user.

[apecush]

Been on the 5w50 fit the last two years. My blend of Redline 10w60 and 5w40 gave a better UOA, but that may have been due to improvements in my track driving style (I.e. Pushing the car harder)

[Hujan]

Originally Posted by kawasaki00

People make their own choices but you will not find redline in any of my stuff. Thats all I will say about that. Are you talking about the Pennzoil, Ultra Euro 5-40?

Mix 0-40 and 15-50 if you want. Wouldn't mix the 10-60 with mobil

I've been thinking of mixing M1 0w-40 and 15w-50. Not sure if it works this way, but would 6 parts 0w40 and 3 parts 15w50 be like a 5w43?

Not sure if it's worth all the fuss, but was hoping it might give a little extra protection when tracking, especially given the heat out here lately.