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					Originally Posted by Brad Roberts  I agree.. the cars are too old for for the thin stuff, and Mobil sold to Exxon in 99-00 and what Porsche bought from Mobil originally is not what is being sold now (lots of additives were removed so Exxon could make more money on each quart)B
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This is quite true. I once used Mobil 1 exclusively, but within just a few months after the Exxon merger / takeover, I noticed that the color and pour point on Mobil 1 had suddenly changed. 
I don't appreciate anyone trying to take advantage of their customer with such a bait and switch tactic. I will certainly never use their products again.