I've been running Castrol 5w40 in my car and have had no problems.
Owner reviews for engine oil
I'm running T6 in my car as well It's been great the last few changes, best oil I've used for my 1.8T and I have over 190k on my engine.
I am using the Ravenol for last 3 changes, oil consumption at 5K change intervals is less than 1/2 quart (about 1/4 qt on last change) and hoping this may lead to less carbon build up.
I did my 1.8T AWP valve cover gasket two weeks ago and I can highly recommend Mobil1 0/40. Used it since 3/2002.
Jumpers, disc golf bag, sleeping bag, old winter jacket w/ wool socks, OEM jack w/breaker bar, 4 qt Rotella T6.
Castrol GTX 5W-30 with an STP filter. NY area. 178k miles with no HLA tick so far. Had some 10W-30 in it before during the winter and the car didn't like it too much, took over 3-5 tries cranking to get it started.
Mobil 1 10w30 with a bosch filter up here in Canada. Haven't had a tick since I started using it, at 110k km my engine is in good shape to begin with though.
the Mobil 1 is the 0w40 Euro Formula, and has the VW502.00 approval that being said, Mobil 1 5w40 Turbo Diesel Truck is also a good choice, but no VW approval.
I'm using Mobil 0w40 (502 spec) in my B5 Passat for 140K and plan to use the same oil for my GLI when the free maintenance ends.
I use Liqui-Moly 5w40 and have with several VWs. Great oil, imo.
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