5W-50 Recommended by TroyJeup

[kyrix1st]

Originally Posted by 330indy

Perhaps.... I threw in Redline at 200 miles in the M3. And it loves a 5/50 10/60 blend.
Talked to Roy and he said the break in comments on the bottle refer to older engines not those in modern production.

I put Redline in the Z3 at 32k miles (it was preowned) and it cleaned it up, as new....

Curious to see how your rod bearings would look.

[Assimilator1]

Yes tight clearances means the load is spread more, which means the same bearing can handle a higher load, which may well be why BMW choose the clearances they did.

But tight clearances also needs thinner oil and smaller tolerances, and more rigid components (as it said in that video), but clearly something went wrong with at least one of these factors. And seeing as they choose one of the thickest grade oils for road cars combined with tight clearances, that's a major red flag.

[kyrix1st]

Originally Posted by 330indy

Here is a BL analysis for the (6q)10-60/(3.5q)5-50 mix. After 5 years...

You got a new engine?

[Scharbag]

Originally Posted by 330indy

I think they were also considering the (engine) temps reached at the Nurburgring or autobahn ....
And the film strength needed at those temps.

I don't think the S65 has an exclusive on rod bearing wear with the high RPMs that it is capable of. Other engines also suffer from rod bearing wear if they're used at the extremes, not to mentioned with extended use oil at 10k OCIs = madness

Please show some examples of other high performance high RPM engines that show premature bearing wear.

[edycol]

Next UOA do TAN too. You want TAN with Easter oils.
SIlicone is not an issue in Redline. They pack Silicon in it. I have seen values up to 30ppm.

[Assimilator1]

Well this is odd, I can't read p12 of this thread...
Stranger still, this ended up on p11! Deleted post I guess.

[edycol]

Originally Posted by Assimilator1

Well this is odd, I can't read p12 of this thread...
Stranger still, this ended up on p11! Deleted post I guess.

Me too.

[Assimilator1]

Glad it's not just me then! lol

[G80indy]

[bmwjdm5]

Nobody is talking about royal purple xpr ? why xpr 10w 60 according to website stats has 102cst 40c and 22 cst 100c .. this would be best cold start protection you can get beating out redline 5w 50 ...

[chris719]

Originally Posted by bmwjdm5

Nobody is talking about royal purple xpr ? why xpr 10w 60 according to website stats has 102cst 40c and 22 cst 100c .. this would be best cold start protection you can get beating out redline 5w 50 ...

It won't be better on really cold starts than the 5W-50. The way SAE J300 works is that an oil has to meet certain dynamic viscosity tests at low temps: cold cranking simulator and mini rotary viscometer. An oil capable of passing the tests must be labeled as the lowest winter grade it passes at. So, this means the Redline 5W-50 is pumpable and cranks at -30 C while the RP will fail at that temperature. It may be true that the RP is thinner at moderate temperatures but it is either forming crystals or crosses over and is thicker than the 5W-50 at some lower temperature.

I tend to think the Redline 5W-50 could be a good option for these engines in cold climates since it has relatively similar KV100 and HTHS to the Castrol 10W-60. It may even hold its viscosity better but that would have to be examined via UOA.

[a5m]

Originally Posted by chris719

It won't be better on really cold starts than the 5W-50. The way SAE J300 works is that an oil has to meet certain dynamic viscosity tests at low temps: cold cranking simulator and mini rotary viscometer. An oil capable of passing the tests must be labeled as the lowest winter grade it passes at. So, this means the Redline 5W-50 is pumpable and cranks at -30 C while the RP will fail at that temperature. It may be true that the RP is thinner at moderate temperatures but it is either forming crystals or crosses over and is thicker than the 5W-50 at some lower temperature.

I tend to think the Redline 5W-50 could be a good option for these engines in cold climates since it has relatively similar KV100 and HTHS to the Castrol 10W-60. It may even hold its viscosity better but that would have to be examined via UOA.

I can try and find the links but based on what I remember reading, Red Line 5W50 by far maintains viscosity better than Castrol 10W60, which shears down to nearly 40 weight pretty quickly.

Bert at BE said their bearings were designed around Castrol 10W60. It's my assumption the oil hadn't sheared during their testing/design. So the way I see it, the oil that's closest to Castrol's viscosity which would serve best for BE bearings intended performance/wear benefit, is Red Line 5W50. I've checked practically every other 5W50/10W60 and none of them come close to Castrol's viscosity numbers.

With BE V2 bearings and dailying in Chicago, I run Red Line 5W50. Up for an oil change soon so will be getting an UOA. Thinking both Blackstone and OAI. You know, for science.

[chris719]

Originally Posted by a5m

I can try and find the links but based on what I remember reading, Red Line 5W50 by far maintains viscosity better than Castrol 10W60, which shears down to nearly 40 weight pretty quickly.

Bert at BE said their bearings were designed around Castrol 10W60. It's my assumption the oil hadn't sheared during their testing/design. So the way I see it, the oil that's closest to Castrol's viscosity which would serve best for BE bearings intended performance/wear benefit, is Red Line 5W50. I've checked practically every other 5W50/10W60 and none of them come close to Castrol's viscosity numbers.

With BE V2 bearings and dailying in Chicago, I run Red Line 5W50. Up for an oil change soon so will be getting an UOA. Thinking both Blackstone and OAI. You know, for science.

The only thing that matters is HTHS in theory, so Motul 300V 5W-50 also has HTHS of 5.0. The thing is, 300V has amazingly low KV100 for that HTHS, so I am actually somewhat skeptical that it really has a 5.0 HTHS... If it does, in short intervals of 3000 miles it is probably a contender also for top oil to run. The 300V 10W-60 is really thick or I'd use that. I'm sure it's great for track use.

[JohnnyBeagle]

Gonna try High Performance Lubricants 5w-50 Bad Ass Racing Oil for a 3-5k mile OCI. The Bob is the Oil Guy forums love their products and spec sheet looks great. Also refilled the differential with their 75w140 Differential Life oil because it also had really great specs.

Also poured in two bottles of liquid moly ceratec because I'm on the factory rod bearings and I saw another post on here about how someone ran it in their oil for 2000 miles and it had already noticeably coated their rod bearings when replaced. Not sure if it's a placebo but I had a lifter tick type sound at idle that seems to be gone now.

[edycol]

Originally Posted by chris719

The only thing that matters is HTHS in theory, so Motul 300V 5W-50 also has HTHS of 5.0. The thing is, 300V has amazingly low KV100 for that HTHS, so I am actually somewhat skeptical that it really has a 5.0 HTHS... If it does, in short intervals of 3000 miles it is probably a contender also for top oil to run. The 300V 10W-60 is really thick or I'd use that. I'm sure it's great for track use.

It is packed with esters. The question is oxidation after 5k. Idk, I have 300V 5W40 now in sump and will see where oxidation lands after 5k.

[edycol]

Originally Posted by JohnnyBeagle

Gonna try High Performance Lubricants 5w-50 Bad Ass Racing Oil for a 3-5k mile OCI. The Bob is the Oil Guy forums love their products and spec sheet looks great. Also refilled the differential with their 75w140 Differential Life oil because it also had really great specs.

Also poured in two bottles of liquid moly ceratec because I'm on the factory rod bearings and I saw another post on here about how someone ran it in their oil for 2000 miles and it had already noticeably coated their rod bearings when replaced. Not sure if it's a placebo but I had a lifter tick type sound at idle that seems to be gone now.

It will do good. It is dual street/track oil.

[Assimilator1]

Originally Posted by a5m

I can try and find the links but based on what I remember reading, Red Line 5W50 by far maintains viscosity better than Castrol 10W60, which shears down to nearly 40 weight pretty quickly.

Bert at BE said their bearings were designed around Castrol 10W60. It's my assumption the oil hadn't sheared during their testing/design. So the way I see it, the oil that's closest to Castrol's viscosity which would serve best for BE bearings intended performance/wear benefit, is Red Line 5W50. I've checked practically every other 5W50/10W60 and none of them come close to Castrol's viscosity numbers.

......

Including Mobil One 10w60?