Engine oil Mobil or Castrol

I’m running Castrol GTX Classic 20w-50. The classic one has the extra zinc, I think they make another GTX that doesn’t.

Been using mobile 1 5w-40 Syn Euro. Fixed my vanos code.

I use 0w-40 euro blend Mobil 1 in the winter and royal purple 5w-30 in the summer and usually try to get an k&n filter or something of similar quality it’s not always about the name but its definitely worth some research

In my experience it pays to use the right oil and brand is important. I always use Castrol EDGE, but i am in a hot climate and i load up my engine.

I live in India and in my place temperature ranges between 5 degree C to 45 degree C and sometimes it touches 49-50 degree C, I put Castrol's synthetic engine oil in a 100CC motorcycle and response from engine felt a lot better, cold start in winters were less stressful and in summer rides, it never felt engine is losing its breath like it used to feel earlier.

I use something similar Castrol Edge 0w-30 European Formula on my 2014.

I use castrol 5w40euro but I’ve also used liquimoly 5w40 and it was also very good to me. Those are my go to’s but I’m sure many others have rec’d other good brands of 5w40 in comments.

Castrol Edge 5w-40 in my 2.8 2001 Passat, 3.6 2017 Touareg, 3.0T 2014 Audi A6 and Castrol Edge 0W-40 in my 2.5 2012 Jetta. Located in Minnesota. Usually run 5W-40 year round.

Jetta was picky last winter, so switched over to 0W-40 from 5W-40. Depends on how harsh the winter, might be a good idea to go 0W-40.

I've used both, M1 was quiter and yes it did burn a quater quart more in the same period.

Fellas, Don't bother running Mobil1 for extended period of time. I have done 2 consecutive oil tests on Mobil1 0W-40. One with 6200 miles and the other was at 4700 miles. Used OEM filters in both cases. Results: With the 6200 mile drain interval, the iron and the lead levels were up there through the roof! With the 4700 mile drain interval, the iron was within average and the lead was couple of points above the average.