General Gen 3 B58 poor reliability

[CountyV8]

Just ordered the next 5000k oil change.

 

[Disco Dave]

I assume our Grenadiers have the gen 3 b58?

View: https://youtu.be/MkOoMwmMOiA?si=OdLM1BVnJ9BjNkco

This is my understanding of the generations.
Gen 1, original B58
Gen 2, otherwise known as the B58TU (technical upgrade) This is in the Grenadier.
Gen 3, or B58TU2. This one has both direct and port fuel injection. This is the problem child.
There are also variations within the generations I.e. high and low power versions.

 

[FlyingTexan]

That's not a new issue. The hurr-durr of the seventies with thick single weight oils and 3000km oil changes persists.

Short intervals hurt nothing in the vehicle, but are pretty darn wasteful of natural resources of they're only used to 30% of their capacity and discarded.

And nothing changes even when there are Toyota trucks with over 1.6 million km, towing/hauling for the majority of those, all run with 16,000 km oil changes of 0w20 in hot places like Texas.

I don’t know anyone running 0w20, not saying it doesn’t happen, but I run 5w40 here in Texas with the BMW LL01 spec and do oil changes every 5k miles, filter every 10k. I will never do the 12k miles. As far as being wasteful; we’re driving vehicles that get 13.5mpg and you’re talking 6 quarts of oil. Go ahead and change it more frequently.

 

[anand]

I don’t know anyone running 0w20, not saying it doesn’t happen

Every dealer serviced and factory fill Grenadier is running 0W20...

 

[ecohen2]

Videos like that are why I hate the internet and unfortunately it's gonna get worse before it gets better. Here are more articles about the B58 that may or may not contradict what that video claims.

How Reliable Are BMW's B58 Engines? Here's What Owners Have To Say - SlashGear

BMW's B58 engine is known as one of the most reliable out there, but it isn't without its issues. Here's what BMW owners have to say about it.

www.slashgear.com

Is the B58 Engine BMW's Best Engine Ever?

The BMW B58 engine is a remarkable one. Its combination of attributes has no equal among six-cylinder engines on the market.

www.bmwblog.com

How The BMW B58 Became The Most Reliable BMW Engine Ever Made

In just nine years, the B58 has a proven track record for strength, reliability, and power

carbuzz.com

The 6 Most Reliable BMW Engines Ever

We have discussed the best reliable BMWs engine so when looking for one, choose from the ones discussed in this article as they are great and will ensure you get the best results.

www.carlogos.org

My recommendation? If you own a Grenadier with a B58, do the proper maintenance, don't abuse the crap out of it and chances are you will get tired of the Grenadier before you have a problem with the engine..

 

[FlyingTexan]

Every dealer serviced and factory fill Grenadier is running 0W20...

He said toyota trucks running 1.6m KM on 0w20 while towing and working and doing 12k km oil changes. But as far as the Grenaider goes that's exaclty why I don't follow their service plan. 12,000 miles on 0w20 is stupid.

 

[anand]

He said toyota trucks running 1.6m KM on 0w20 while towing and working and doing 12k km oil changes. But as far as the Grenaider goes that's exaclty why I don't follow their service plan. 12,000 miles on 0w20 is stupid.

All of our Toyotas went 10k on 0W-20; and while yes, it is thicker; MB does 20k miles on 0W-40 (or 5W30, or 5W40)...

Even BMW does 10k with 0W-12 on the B58TU2.

12k intervals wouldn't be recommended from a manufacturer who has a (internally) published engine longevity expectation if it was detrimental; however, if you want to change it more frequently, please do

 

[FlyingTexan]

All of our Toyotas went 10k on 0W-20; and while yes, it is thicker; MB does 20k miles on 0W-40 (or 5W30, or 5W40)...

Even BMW does 10k with 0W-12 on the B58TU2.

12k intervals wouldn't be recommended from a manufacturer who has a (internally) published engine longevity expectation if it was detrimental; however, if you want to change it more frequently, please do

BMW use to say 16k until they had too many failures so they backed it down. The 0w20 is due to CAFE laws and there to get you to the end of warranty, not to keep it running forever. It boosted BMWs mpg by 3% across the board. When they first went to 0w20 the oils couldn't meet the stringent requirements of LL01/LL04 so they lost the spec. A new spec had to be designed. Weights of oils is a US thing. It comes down to HTHS and in Germain they don't run 0w20 in these motors. Wear tests show that 0w20 doesn't hold up nearly as well as a heavy 5w30/40. Best thing for it is a LL01 oil unless you know your fuel meets the 10ppm sulfur requirements then run a LL04 oil with a MB 229.51 spec and if you're lucky to find it a Porsche A40 or C40 spec. A bottle with that is better than anything else. BMW's spec focuses more on corrosion resistance, MB lubricity tolerances, and Porsche runs the hell out of it looking for breakdown. Switching from 0w20 to QS Euro 5w40 made it run much smoother. The heat and pressures have been great even when off roading in the desert in 105+heat and the used oil analysis I've done at my oil change intervals have shown the oil holding up well with very good engine wear numbers. When people track the B58 they all run the heavier weight oils. When they first came out with the Ecodiesel Jeep was recommending a lighter oil until they had too many main bearing failures. Eventually they had to back off and let people go back to using Rotella T6. If it's designed for fuel efficiency it isn't designed for it's longest life.

https://bmwtechinfo.bmwgroup.com/tech_training_manual/ST1505%20B58%20Engine.pdf

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