5w is a bit thin really (especially in the summer). I'd think of it as a flush oil and change it soon for a quality 10w40 ie selenia.
J.sut[/QUOTE]

 

Did they replace the oil or just top it up ... a top up with 5W40 should be OK.

 

The oil was replaced.
So 5w-40 should work just fine you think?

 

I had Agip 5w 40 in my 156 for a year and it was fine. Lyles in Newcastle put it all the Alfas they service as far as I am aware.

 

The oil was replaced.
So 5w-40 should work just fine you think?

The oil is fine. There is no disadvantage in a lower cold state viscosity figure (the 5). Generally there are advantages in a low cold figure because the oil gets to the upper parts of the engine quickly when cold starting.

Once hot, the oil will act the same as a 10 - 40. People like 10 - 60 because of the high hot state viscosity, which may give better compression in a hot engine, less oil consumption, other reasons... but the only reason why the low figure is 10 is because no one can make an oil with a range from 0 - 60, although this would in some ways be a theoretically ideal oil.

I use Mobil or Castrol 0 - 40.

The 5 - 40 is fine.

Stevo