What oil?

[eacmen]

I think Motul works well because it was designed well. LMP1 and LMP2 cars use Motul for a reason. I wish Joe Gibbs made an oil for our engine but from a business standpoint, they'd never make up the cost from development.

Le Mans is next weekend and it's going to be awesome!

Personally I wouldn't choose oil by what racing teams use. That oil is changed frequently, for LMP cars usually between races. A formulation that works well for race cars for one weekend is very different than one that lasts 7500 miles.

Dont get me wrong Motul is a quality oil. But looking at the logos on the side of racing cars is not what you should be concerned with.

Currently have a stockpile of Castrol edge that I'm going through. After that going to try either Ravenol or Motul.

I bring some leftover liquimoly to the track in case I need to top off oil, I never use it for a full fill.


Sent from my iPhone using Tapatalk

[Icecream]

btw Driven make a 5W-50 synthetic "street " oil which was meant for 4V variable valve timing engines so cant see why it wouldnt work as good as any other oil all the fan boys go nuts over

Marketing rubbish??? What the heck would it matter if it was 4v or 3v or 2v without VVT?

[digger]

I think Motul works well because it was designed well. LMP1 and LMP2 cars use Motul for a reason. I wish Joe Gibbs made an oil for our engine but from a business standpoint, they'd never make up the cost from development.

Le Mans is next weekend and it's going to be awesome!

btw Driven make a 5W-50 synthetic "street " oil which was meant for 4V variable valve timing engines so cant see why it wouldnt work as good as any other oil all the fan boys go nuts over

[Arith2]

I think Motul works well because it was designed well. LMP1 and LMP2 cars use Motul for a reason. I wish Joe Gibbs made an oil for our engine but from a business standpoint, they'd never make up the cost from development.

Le Mans is next weekend and it's going to be awesome!

[digger]

the fact they even recomended a 5W-30 and then changed to 10W-60 which is not a small change shows their visocity recomendations have zero credibility.

[IamFODI]

What do you guys think of the latest (2013) oil bulletin from BMW on our engines?- it says a specific Castrol 5w30 is approved along with TWS

IIRC BMW pulled that soon after posting it and went back to recommending 10W-60 oil (TWS, then TwinPower Turbo). People think it's current because the threads are still floating around with their original titles ("5W-30 now allowed!" etc.) but it hasn't been for years.

[IamFODI]

Yeah, that's what I meant as somewhere, something is getting hotter if that's the case but ultimately that means the oil has to get hotter too (and since the heat transfer in this example is poor it also means it stays hotter longer and ultimately, over time, the oil will get hotter and hotter if it cant get rid of ththeheat it is exposed to)

This is what would happen if the oil were the engine's main or only means of heat rejection.

Aside from the exhaust, the engine rejects heat through the coolant, the oil, and the air (pretty sure in that order). Reducing the proportion of heat pulled away by one of those will increase the proportion pulled away by the others until one or both reach capacity.

Arith2 said his lower oil temps were when he was just cruising around. In those cases, the coolant system is WAY below capacity and should easily be able to pick up any slack.

[Flat-Six]

Purchase using PayPal, use free return shipping service from PayPal. Little known benefit, perfect for this situation.

Excellent! Thanks. I always use PP, just did not think of using their return shipping. Thanks again.

tim

[Icecream]

What do you guys think of the latest (2013) oil bulletin from BMW on our engines?- it says a specific Castrol 5w30 is approved along with TWS

I think BMW doesn't give a damn about a 20 year old platform and never really knew why the bearings failed in the first place lol.

[Carbonvert]

Up to $30 each time right? Not $30 total per year. That would only cover 2 boxes, though that's better than nothing.

I am reading it as $30 per shipment up to 12x per year. It looks like you must activate this feature.

https://www.paypal.com/us/webapps/mpp/returns/terms

https://www.paypal.com/us/smarthelp/article/what-is-return-shipping-on-us-and-how-do-i-activate-it-faq3544

What do you guys think of the latest (2013) oil bulletin from BMW on our engines?- it says a specific Castrol 5w30 is approved along with TWS

I attached both the 2013 (TWS and 5w30) and 2008 (TWS only) bulletins to this post. I ask because I see Motul 300v 5w-40 is on FCP. Always wanted to try that in my street driven car.

[Icecream]

Worse thermal conductivity in the oil means less engine heat makes its way into the oil, right? Depending on other factors (coolant system, air flow, etc.), that could easily mean lower oil temps.

BTW, I'm not saying this is necessarily happening here. I have no idea. Just mentioning a possibility.

Yeah, that's what I meant as somewhere, something is getting hotter if that's the case but ultimately that means the oil has to get hotter too (and since the heat transfer in this example is poor it also means it stays hotter longer and ultimately, over time, the oil will get hotter and hotter if it cant get rid of ththeheat it is exposed to) There are too many moving parts (literally) to be able to know exactly what's happening and where the heat is going but I guess my point is if the oil had significantly worse heat transfer then enough heat would have to go somewhere else that you would notice and I suspect it wouldnt be good forthe engine/pistons and all the other lubricated parts that rely on oil to move heat from the parts inside to the air outside. But this is all beyond my expertise since I have never tested/designed engines.
i guess the elephant in the room is that overtime (on a long drive perhaps) there must be a point where the engine would get hot enough anyway that it wouldnt matter what the heat transfer was since the engine would get very hot and over time the oil would still have to come up to temp but at a slower rate. I suspect in this situation the engine would get hotterand hotter as would the oil but at a slower rate until either the engine seized or the oil broke down or both. But that is neither here there.
my main point was that heat transfer is a two way street, gawddddd.

As for volume, that should make a difference too. That's why so many things on here and stories of quiter/smoother/cooler are anecdotal at best and should never be taken as anything more than that without real data in controlled unbiased conditions.

I use bmw/ shell now btw. It works, engine is way quieter and smoother than before and I think a couple more hp. Stereo sounds better too when I use it, probably because the battery stays cooler.

[IamFODI]

Can't the volume of oil also affect temps? Slows down the crank more, more heat? Or less heat as there's more volume to absorb the heat?

In order: Yes, theoretically but not really in practice, yes

(assuming "less heat" really means "lower temps")

[Tbonem3]

Can't the volume of oil also affect temps? Slows down the crank more, more heat? Or less heat as there's more volume to absorb the heat?

[IamFODI]

I don't think it works that way.

If it transferred heat poorly, it wouldn't cool the engine and would lead to higher temps SOMEWHERE. If anything low temps mean the oil can transfer heat better.

Worse thermal conductivity in the oil means less engine heat makes its way into the oil, right? Depending on other factors (coolant system, air flow, etc.), that could easily mean lower oil temps.

BTW, I'm not saying this is necessarily happening here. I have no idea. Just mentioning a possibility.

[Icecream]

Interesting. Thanks.

AFAIK there are three possible reasons why oil temps might be lower:

3. Worse heat conductivity

Would be interesting to try to figure out which one is happening with this oil.

I don't think it works that way.

If it transferred heat poorly, it wouldn't cool the engine and would lead to higher temps SOMEWHERE. If anything low temps mean the oil can transfer heat better.