Engine oil AMSOIL or OEM BMW

Been running amsoil in my Vitpilen 701. Same engine and it's been great. I run the 15w-50 metric stuff though.

I’ve run amsoil in all my bikes and still do. Same with all my cars and trucks. Never had issues

Zero need to get under the car, I loathe having to do it with my BMW stuff. With the Mrs' Audis I could literally change the oil in a tuxedo & not get a drop of oil on myself.

On my M135i F21 LCI, I always let the initial cold-start finish until the idle drops and then start driving while not going above 4.000 for the first ca. 5km and not giving full gas until the engine oil temperature is 72c or more.

Been doing that and till now no issues or leaks, the engine is running sweet.

I do a 5K oil change interval. I let it warm up for 5+ minutes every morning. Not necessarily because I'm intending to warm it up to operating temp but because that's just how my morning routine goes. I drive moderately and keep the RPM's below 3K and try to keep below 50% load on the engine, aka drive moderately.

For me amsoil signature series 0w20 a lot better than ravenol ehs 0w20.

I'm regularly using amsoil ss on my Honda L15z1 engine almost 7 years.

0W-20 Amsoil Signature Series 100% synthetic oil changed every 5k miles. Wix 57173XP filter.

Oem Bmw 5w30 longlife 04. I used this for 8 years in my high mileage n47 and sold that thing mint. Go with oem and don't waste a second more thinking about it. Enjoy the car. Just do the changes on time or early and it will be good.

I just switched over to amsoil and my mpg went down marginally. Also using the PPE larger oil filter 10 micron filter.

Oil consumption is a common problem. My original E92 consumed a quart of oil every 1K miles. My current car does not.