Engine oil AMSOIL or OEM BMW

Rotella T6 here. I was a long time Amsoil guy, but it's just too fracking expensive, especially with the amount of miles I drive a week.

I'm running Amsoil in my 06 GTi and loving it. No trouble with that I can tell, I check dipstick every fillup occasionally have to add some but not a quart, not even .25 of a quart. I've got almost 72k on the clock I did my last oil change around 67500 maybe a little more, and oil is still clean. Car sounds no louder or different from oil dealer had put in it.

Looks to be exact same procedure as on my e46. Perhaps the easiest oil change I've ever done. In fact, I've used the same brand and spec oil too, which is an BMW LL-01.

i run 5-40 amsoil in my VRT as well

It's a little more pricey but extends change intervals and has worked for me. Keeps engine temps a bit cooler as well.

Now i am referring to amsoil, Delo 400, mobil one turbo deisel truck oil.

in my Diesels i use amsoil or chevrons delco synthetic for heavy duty diesel engines.

i change at the extended interval and use only 100% synthetic oil usually Amsoil. I plan on using the same in my TDI at the normal service interval unless vw makes a full syn diesel oil

The only oil I used in my Audi before Amsoil was Mobil 1, and this far surpasses it.

You will not get better, check the results yourself, I gained 9hp and 6 ft lbs of tourqe and increased my gas mileage per tank 35-50 miles.