[thefatstig]

Apologies if this has been discussed to the far ends of the earth. I did find a thread but am unable to re-locate it now. Was there some opinion on tuned 340i B58s and NOT using the recommended BMW oil ? Anyone with a tuned 340 using the BMW recommended or a different weight ?

[F32Fleet]

Originally Posted by thefatstig

Apologies if this has been discussed to the far ends of the earth. I did find a thread but am unable to re-locate it now. Was there some opinion on tuned 340i B58s and NOT using the recommended BMW oil ? Anyone with a tuned 340 using the BMW recommended or a different weight ?

Current LL01(2018). The dealer 5w30 is an excellent product. Based on its cold crank viscosity alone it could be classified as a 10w-30. The smaller spread means less viscosity index improvers are needed in order to meet the minimum HTHS threshold. Ex, 0w40's have a lot of VII's. BMWTPT 5w30 also has a ridiculously low Noack of 6 percent. Redline and Ravenol are the only others I can think of which have a similiarly low level.

This dealer oil is also affordable.

http://pqiadata.org/BMW_5W30.html

Below is a tool which allows you to compare OEM spec's (ex LL01 vs LL01FE).

https://online.lubrizol.com/relperftool/pc.html

[thefatstig]

Originally Posted by F32Fleet

Current LL01(2018). The dealer 5w30 is an excellent product. Based on its cold crank viscosity alone it could be classified as a 10w-30. The smaller spread means less viscosity index improvers are needed in order to meet the minimum HTHS threshold. Ex, 0w40's have a lot of VII's. BMWTPT 5w30 also has a ridiculously low Noack of 6 percent. Redline and Ravenol are the only others I can think of which have a similiarly low level.

This dealer oil is also affordable.

http://pqiadata.org/BMW_5W30.html

Below is a tool which allows you to compare OEM spec's (ex LL01 vs LL01FE).

https://online.lubrizol.com/relperftool/pc.html

Awesome, thank you !

[AspektUSA]

Personally, I don't think oil weight is as important as you shorting the intervals due to potential issues like fuel dilution.

Do 5,000-7,500mi instead of 10,000mi.

Go up in weight if you find your oil is overheating, otherwise it should be fine as-is.

[about94ninjas]

Agreed, I feel like shorter intervals are more important than the oil you use.

That being said, I use shell 5w40 diesel oil. Was skeptical at first, but heard good things from everyone that uses it. 5k miles in and no issues, I feel like it made the engine quieter and smoother, but that could just be in my head. And 20 bucks a gallon

[F32Fleet]

Originally Posted by about94ninjas

Agreed, I feel like shorter intervals are more important than the oil you use.

That being said, I use shell 5w40 diesel oil. Was skeptical at first, but heard good things from everyone that uses it. 5k miles in and no issues, I feel like it made the engine quieter and smoother, but that could just be in my head. And 20 bucks a gallon

Never run a heavy-dity diesel oil in a gas engine. They use different additives and VII's because the engines have vastly different operating environments vs a gas engine.

[about94ninjas]

Originally Posted by F32Fleet

Never run a heavy-dity diesel oil in a gas engine. They use different additives and VII's because the engines have vastly different operating environments vs a gas engine.

I've heard lots of people swear by it, so I figured I'd give it a shot. Changing the oil this weekend and sending a sample to Blackstone, so we'll see what the results are compared to the OEM 0W-30 I ran before.

[3FortyI]

Tuned 340i - using Liquid Moly. 5w-30

FCPEuro has a kit with everything that is reasonably priced, and that's what I use.

[F32Fleet]

Originally Posted by about94ninjas

I've heard lots of people swear by it, so I figured I'd give it a shot. Changing the oil this weekend and sending a sample to Blackstone, so we'll see what the results are compared to the OEM 0W-30 I ran before.

Ya I understand. The typical reason is that HDEO's have more ZDDP additives which is something that can be compared to motor oils in general.

The thing is that ZDDP isn't the only game in town and there are families or organic additives which don't show up in an UOA.

Same goes for visocity index improvers. HDEO's use different types.

Best case is to shop OE certs. Porsche/VW, Mercedes Benz, and BMW. More certs an oil has the more likely it's a high quality product.

Besides lubricant failures are almost a thing of the past. If it happens it's going to be poor engineering and no oil will stop that.


On a side note. The absolute worst thing is to do is choose an oil because it's advertised as "exceeding xyz". Exceeding to not equate to better when it comes to the performance of motor oil. It's just advertising.