Engine oil Mobil or Castrol

I had to top off once and used Castrol Syntec, which is about $3.50 where I live.

Mobil 1 does make 5W-40. I use it. They label it Truck and SUV but don't let that throw you-just a marketing ploy. I switched from 0W-40 and my oil temps are slightly lower. My car is not winter driven so I don't need anywhere near a 0w. If I remember correctly 5w-40 is thinner than 0w-40 above freezing anyway.

same here in IL - 132K still going strong

I use Mobil 1 0w40 year round in Missouri, never had a problem.

I have seen NO reason not to use Mobil 1 5w40 in a NON PD TDI motor. I know many that use it and no problems RELATED to oil. They do not coke up and the wear isn't there. I have used 5w30, not even 5w40 Mobil 1 in my VW/Audi 2.4L engine in my Volvos for years and have seen the best results

I have used both 0w40 and 5w40 Mobil 1 in a 02 Jetta for a long time with great results.

I have used Mobil 1 for years in Volvo diesel cars, and they are known for cylinder wall wear, of course its a VW Audi engine. With using Mobil 1 5w30 over several hundred thousand miles, I have seen zero wear and have not needed to adjust the valves once, in several engines. I am convinced it works well.

My favorite is simply Castrol drive hard. I run it in all my engines except the VR.

I used mobil 1 5w30 when I did the 10K oil change as well.

my v6 consumed almost a quart during the first 3,000 miles then it stopped (zero oil consumption!).