Engine oil Mobil or Castrol

The German-made Castrol 0W30 is an excellent oil. I would use it without hesitation.

I am using Castrol 0w-30 Synthetic. The Castrol distribuitor here in my country has a Audi A4 and he recomend to use 0w-30 synthetic. This oil meet VW specs. My dealer also recomend the same.

I was running Mobil1 5W30 and switched to Castrol Syntec 5W50...I noticed 2 things...first, the engine became a lot quieter...less ping sound...secondly, the gas mileage went up...

I have been using 15W-50 Mobil 1 in the '92 Jetta for the past 130K miles (it has 264K miles total on it !!!). It doesn't leak or burn a drop and it is all original (best motor I have ever had!!!).

I recently tore down a Ford 302 V8 with over 300K miles on it which I know ran Mobil 1 all of it's life and it was just as clean as the new (Jasper) engine being installed! No varnish, sludge build up and virtually no wear!

I have found little if any inconsistancy from using Mobil 1 5W40, Redline, Royal Purple & Amsoil. Since Mobil 1 is much more readily available I chose to use that and works out great for me.

I Change my oil every 4000Km and use Mobil Delvac 1 5w40. You can get it at Walmart. I like the 5w40 because it his light enough if you have to start your car below freezing there is no oil starvation. It is also heavy enough that it protects well under high revs, high heat and heavy loads.

On my car (1992 SLC VR6) on a 100 degree humid summer day, I see a max of 260 degree Farenheit on my oil temp display. I'm running Castol (non-synthetic) 20w-50w in the summer, but I switch to 5w-30w or any of the less expensive 5w-xx oils during the winter. I've been doing this for 5 years now, changing the oil & filter every 3000 miles, and so far, no problems.

I pulled my chipped K03 at 50K miles and looked at it, along with the oil lines, and everything was perfect. Not one sign of coking. This was after using Mobil 1 from 10K to 50K.

15w/50 mobil1 or 20w/50 anything else. fixed me right up.