Engine oil IDEMITSU or OEM BMW

Regarding brands, if you want to stick with factory oil without dealer price, Idemitsu is the brand to get. I emailed Mazda corporate and they said Idemitsu is the OEM for their oil.

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.

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 have a BMW e36 and it is standard practice to run an extra quart of oil at the track to prevent oil starvation and lifter tick. I have been doing it for years with dozens of track days along with many other people I know with no issues.

I have a Sohn kit and run Idemitsu engine oil in the engine and Idemitsu premix in the Sohn. Runs lovely and smooth and the original cat is still doing the job.

We use Idemitsu for engine oil and transmission and red line for front and rear diff. Red line makes a good fluid for the transmission also.

Lots of BMW's as they get in to the upper mileage tend to start consuming oil one way or another.

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