Originally Posted By: oil_film_movies
Originally Posted By: edyvw
Turbos in N54 and turbo in N55 are running extremely hot. And while I appreciate BMW's concern for environment, I am not so sure whether engine and wallet would appreciate that. In the end, what is gain in fuel economy with LL01 FE?
Gain in horsepower, and fuel economy too, is 1.5% going to an HTHS=3.0 oil here, due to less engine friction.
Using a full syn dexos1 oil (used in turbo engines all the time) will work fine. Remember BMW N52, N54, and N55 sixes have great oil-to-coolant heat exchangers to keep oil temperatures in a tight range.
Again, to the OP's original stated goal, he could change at 5,000 miles and be in great shape with a BMW-recommended HTHS level.
Trust BMW, they have been making engines a couple of years now.
Do not forget that BMW puts in dealerships LL-01. Also, do not forget that LL-01FE serves for CAFE purposes.
I trust them, but I also know that BMW has first in mind their profit and when it comes to CAFE it matters what is going to be fleet MPG.
On top of that, with CBU issues on N54, and to lesser extent on N55, I am not sure would I run oil with NOACK of 13-15% in DI engine.
But hey, trust BMW, same like trust them with water pump in N55 or HPFP.
Originally Posted By: edyvw
Turbos in N54 and turbo in N55 are running extremely hot. And while I appreciate BMW's concern for environment, I am not so sure whether engine and wallet would appreciate that. In the end, what is gain in fuel economy with LL01 FE?
Gain in horsepower, and fuel economy too, is 1.5% going to an HTHS=3.0 oil here, due to less engine friction.
Using a full syn dexos1 oil (used in turbo engines all the time) will work fine. Remember BMW N52, N54, and N55 sixes have great oil-to-coolant heat exchangers to keep oil temperatures in a tight range.
Again, to the OP's original stated goal, he could change at 5,000 miles and be in great shape with a BMW-recommended HTHS level.
Trust BMW, they have been making engines a couple of years now.
Do not forget that BMW puts in dealerships LL-01. Also, do not forget that LL-01FE serves for CAFE purposes.
I trust them, but I also know that BMW has first in mind their profit and when it comes to CAFE it matters what is going to be fleet MPG.
On top of that, with CBU issues on N54, and to lesser extent on N55, I am not sure would I run oil with NOACK of 13-15% in DI engine.
But hey, trust BMW, same like trust them with water pump in N55 or HPFP.