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Originally Posted by Tool Pants
All of the above and more is why what oil to use is often debated.
Porsche comes out with a list of approved oils about once a year. 0W-40 was put on the list in 2001. 5W-40 was put on the list in April 2007. The list for 2001 said Mobil 0W-40 was now going to be the factory fill.
...snip...
Oil is a funny business. Mobil has the lion's share of the synthetic market. Mobil makes enough money that they can pay manufacturers like Porsche and Corvette for a sticker on the car.
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Jeff, thanks for your informative post. Q: when you say that a particular grade was put on the list, does that imply that that grade was applicable to the porsches sold that year? So, for instance, per your above post, 5W-40 is (one of) the recommended grades for porsches sold in 2007, whereas 0W-40 is (one of) the recommended grades for cars sold in 2001.
Thanks!
PS: I'm getting the itch for doing the OBD hack on my 01 (I need the temp to tell me whether to turn on the heat or the ac
). I'll send you a note when I run into trouble.