I ran Castrol 0w-40 euro blend for both my e46s and the stuff was awesome
I did an oil change at 6,300 miles on the factory fill. I sent it in for a UOA through Blackstone labs, but I'm not sure how to attach it here. The TBN showed some life still left in the oil, they suggested trying 8,000 miles next.
I would drain that oil with the Marvel in it and use use 0w-40 Castrol Full Synthetic (Made in Germany/Belgium). You can get a 5 quart jug at Wal-Mart for less than $25 usually. It's probably the best "over the counter" oil you can use in a VR6. Widely used and highly recommended.
I went with the Castrol Edge 0w-40 because it's a great oil with a good PAO content. It's also fairly inexpensive. I'll sacrifice the rebate on Mobil 1 as this oil seems to hold up better for my driving style over 10k miles.
I typically use Castrol Edge 0W-40 at 5000 mile change intervals unless my annual service interval comes up at the dealership.
I personally use the Castrol 0W-40 that meets the VW 502 spec. Per the Bob is the Oil Guy forums, it’s one of the best oils out there and is available at a great price from Wal-Mart, at ~$25 per 5qt jug. I’d use this oil in any VW and not think twice.
I run German (Belgian) Castrol, which comes in a 0w-40 or 0w-30 weight. In general, it's better than the US spec stuff that sage149 posted because Europe has stricter oil standards than the US and it holds better certifications like MB229.5. I mainly run the 0w-40, and while I only have 13k miles, it does include 4 track days and the oil level doesn't change in between oil changes.
I use Castrol Edge 5W-40; works just fine
Glad to be of help helmyv5. In one message, I mentioned I'd try a more expensive oil next time. I've now been running Castrol EDGE FST-Ti for the last two oil change intervals. Normally, oils are very hard to tell apart from one another (Like how the engine sounds, gas mileage, other \"seat of the pants\" stuff) But, this time I can definitely spot one difference, which is noticeably less sludge in the PCV system than with the Helix Ultra.
As much as I love to use Mobil One, I am going to stick with Castrol because VW dealership won't give me any credit for the Castrol in exchange for the Mobil one.
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