Originally Posted by
velociabstract
Are you aware that Mobil 1 0w 40 formulation has changed? All viscosities have changed. Yep, all oils undergo changes over the years which is why recommended oils change. I'll use ANY oils on the current MB recommended list with confidence. That includes several brands of 5w 50. Yeah, I have the label to use only Movil 1 0w-40 under the hood. Unfortunately, I can't find 0w40 with a 2006 production date. This is a useless discussion IMO. From all indications, 0w-40 is one of Mobils 1 best oils. But that doesn't mean that for hot climate, high mileage or racing conditions it's the only oil to use. If you actually look at the list of approved oils they range from 0w30 to 15w-50. Yes, I know Chrysler doesn't have a list like MB does. So we need to scour the internet for oil produced in 2005 to be in true compliance.
Les
No matter what viscosity synthetic we buy the shearing power of our engines causes the molecule chain to break apart and it doesn't take very long. The world is a changing place, oil and fuel is also changing, in my neck of the woods were down to having only Shell selling gas without ethanol and only Petro-Can selling octane higher than 91 . Ethanol is hard on rubber parts for my other machines...fuel affects oil directly so choosing the right one makes a diff... I don't drive my Crossfire during winter or after the first salting so it sits alot so an oil change can be longer. Its hard to find even 0-40 Mobil , I found a few litres so it will be a 5-40 Syntec and mOBIL mix(MB approuved) with Lucas synthetic stabilzer(pure synthetic 1 litre thrown in to keep the enigne lifters happy when it sits).