I used to run Mobil 1 5w30 and switched to GC. There was a nice difference, with only one side effect - the engine feels super sluggish when cold compared the Mobil 1. It runs great once warmed up though!
I've used Mobil1 (0w-40, 5w-30), Shell RotellaT (5w-40) and Castrol Syntec (5w-30) past 100k miles. Before 100k, it had whatever garbage the dealer put in. Engine still runs like a top with great fuel economy and no unusual oil consumption at 203k miles.
I'll continue to use my Mobil 1 0w-40 for another 4 years.
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.
I used mobil 1 5w30 when I did the 10K oil change as well.
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