Musikmann and Gregs210, psp9218
I will differ a bit here, if the oil has any sort of sj-sm marking, then you should be safe to run 5000 or even 6000 miles.
I am quite sure the 229.5 spec and fleece filter are for extended interval of up to 15000 miles.
Normal 5 quarts SJ+ oil sump will protect any car for 3000-5000 miles, yours has 8 quarts capacity.
Don't shoot me.
I'm not shooting anyone, but I will respectfully disagree.
All I'm saying (repeating) is that the oil he poured in (1) is the wrong viscosity for the engine in Mobil1 trim and (2) does not have MB's specified base pack of additives. While I suspect there may be oils out there that have the capability of protecting the engine as well as or perhaps even better than one that meets MB specs, I am sure that the 5W30 or 10W30 or 0W30 DOES NOT (those were specifically rejected by MB on the sheet Wolfgang posted as not meeting shear requirements for FSS engines).
I'd also submit that capacity is irrelevant; 8, 20 or 50 quarts of the wrong oil doesn't make it the right oil, does it? Moreover, there are plenty of conventional oils that are the wrong weight but meet modern API specs, how long can we leave those in? (It's an ugly path to start down if you follow the logical progression.)
Overall, I think it's unlikely he'd do any significant, lasting damage to the engine if he changed it in 5,000 miles. However, I'd never want to suggest that he do so, if only for the reason that if something did fail, he'd partly blame me. Plus if he did later develop problems he'd always wonder if he brought them on by this event. Peace of mind is worth dumping $35 of wrong oil.
As I said, I once made the same mistake. For the cost of the oil it simply was not worth risking it, which is why I changed it out as fast as I could after I learned my mistake.