So, following the advice of the experts here in the forum, I went today to the oil change (Mr. Wash, Munich, EUR 59,90 incl. oil filter and car wash) already 13 TKM after the last oil change and got this time not the 0W-30 but the 0W-40 filled in. The gentleman there said that this would be the same, the 0W-30 was from Castrol and the 0W-40 would be the same stop from Shell. After the car already 132 TKM I got the 0W-30 for the first time at SAAB last, probably because the car is already older (otherwise I have vo n SAAB always get the 5W-40). The question is: Is there any problem if the next 10 TKM is driven with 0W-40 ?? Or is it more or less whirling, whether 0W-30 or 0W-40 ?? Which of the two actually now in the cold season ? Thanks icarni, wiesbaden