Hello, I know that now some red will see…….already such an oil question again! But somehow I am unsure and could not find any help in other Treads. My oil sieve should be checked now, and I may bring my own oil with me……if it corresponds to the specifications. What can I take? I know it should be full synth., but maybe there is someone here who really has experience with the cars and definitely what to tell me kan Because the Saab car dealerships are always running the 0W30 or something. (longlife), but that’s expensive and should “hold” 30 000km. But since I change all 7-10 000km I don’t need that. Is Mobil 0W40 full synth. good? or allowed? (9-5 AERO 230hp) The vehicle is driven 70% in the city, only as an info. Have something around today to find out prices. Now please explain to me one thing: how can it be that I call a Saab car dealership, and which I call as a minimum price 40 0€ ! for the sieve cleaning specify, but another Saab car dealership 20km as the crow flies from which ENtfernt only 180€ wants!? Both without new oil, so only the pure cleaning of the oil tank and sieve, a difference of 220€!!! , you can convert this into the good old D-Mark. Man there you learn all the more that man has to compare prices! MfG