Engine oil Mobil or Castrol

Just did a major service using castrol 10w40 Maganetec with new Iradium spark plugs etc. Car is super smooth & pulls strings & no overheating.

I love the Mobil 1 ESP 5w30 for normal duty. It meets the latest 504.00/507.00 VW standards (newer than 502/505), and is specifically designed for diesel motors. Turbos are tough on oil, and diesel oils take prolonged periods of high heat much better.

I recommend 5W40 Castrol Syntec! Here's why: Smaller numbers = thinner oil. The "W" means "Winter" - or the viscosity of the oil when the engine is cranking, and first warming up. The 5W oil is very thin when cold. The engine will crank faster, the pump primes better. The hydraulic lifters in your 16v will fill up and follow the camshaft better and with less noise. When you are at operating temperature, the 40 weight oil will give you the protection that a VW engine needs.

i have used M1 0-40 for years and its been great IMHO. not too thick at startup, not too thin at op temp.

Mobil 1 0W40 VW 502... Great stuff.

I use 5w-40 Castrol Syntec without any issues.

I use Mobil 1 full synthetic(type 4)20w50 in the summer and 10w40 in the winter(we range on temps here widely, hence the change in oil viscosity by the season).

I use Mobil1 0W-40 on a 149K motor.

Edge worked great for me. Maybe the best oil on the market.

I've used 0W40 Mobil 1 Full Synthetic from the beginning. I have Blackstone Labs constantly analyze my oil. It started with several 5k mile analysis and then I upped it to every 7.5k miles. The oil analysis came back very healthy on all 5k and 7.5k mile analysis, and led me to up it once more to every 10k oil change interval which it will remain. I use the larger Passat 1.8T oil filter. The engine has almost 170k miles on it and still running strong.