Extractor all the way. As for The amount left behind, it is inconsequential if you are maintaining a short oil change interval. I've seen a couple YouTube videos showing maybe 3 or 4 oz left behind.
Anything Dexos2, my fiancé worked at a chev dealer and I was getting their bulk 5w30 dexos2 at cost and my LSPI issues went away, mobil1 ESP went in last oil change at 250k km
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.
I've been using Mobil1 in my car for three years because the garage I worked at had a contract with their local distributor, and that's what I got at a steep discount. Last year I put Total's equivalent oil in it, absolutely no discernible diffrence between the two.
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.
I run 5w30 Mobil 1 ESP with a Mann filter every 10k kms on my 7.5R. Got a great deal on it when it was on sale. It meets VW ratings, and I feel like that is really what is important.
I am using Liqui Moly now, but was using Valvoline/Mobil 1.
Got my car at 36k miles, and used the Valvoline/Mobil 1 up to ~300k miles and no major issues…
Installed new oil and filter, plus BG oil flush, ran at idle for 30 minutes (warm-up, plus 15 minutes). Changed oil and filter again, using Mobil 5W40 Euro oil.
Make sure you don't run Mobil 1. Subaru engines tend to shear Mobil 1 down to a lower weight oil quickly.
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