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Can Mobil 1 0W-40 be Used Year-Round in BMWs and also in a SAAB?
 
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Question:
Can Mobil 1 0W-40 be Used Year-Round in BMWs and also in a SAAB?
Hello. I have three questions, actually. I have a 2004 BMW 745li, a 2006 BMW 330ci, and a 1992 Saab Turbo Convertible. BMW recommends their own oil or Castrol. You recommend Mobil 1 0W-40. Is it OK to use this oil in both BMWs year-round? Also, I have purchased your recommended oil, and I find you recommend a different Mobil 1 product for my Saab. Can I use the 0W-40 in the Saab as well? Many thanks for your advice.
-- Robert Rubin, Denver, CO
Answer:
You can use Mobil 1 0W-40 in all three vehicles. The 0W-40 is the best viscosity for the BMWs but you could also use Mobil 1 0W-30 Advanced Fuel Economy or Mobil 1 5W-30 in the SAAB and possibly gain a bit of fuel economy. The use of the 0W-40 in the SAAB turbo is an excellent choice as well and because of its age we would recommend that you stay with the 0W-40.
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