Ok to go with 10W40 oil in my Diesel Yaris?

[Tommygunn]

Would I be ok to fill my 2002 Yaris D-4D(Diesel) with 10W40 oil as opposed to the usual 10W30?
If it helps the car has about 93,000 miles on the clock and we're approaching an Italian winter that could, at the extreme, be knocking on -5°C.

Reason I ask, is that I can get a deal on a load of the stuff and I can also do my Fiat at the same time.

Cheers,
Tom.

[CTScott]

For the 1ND-TV engine, 5W-30 is the "preferred" oil from -30C to 38C+. 10W30 is recommended from -18C to 38C+ and 15W40 is recommended from -12C to 38C+. So, 10W40 would be fine down to somewhere between -12 and 18C.