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I think the Euro standards ACEA are more important than the API ratings.
If the Rotella oil has ACEA A3/B3/B4 specs it "should" be OK, but it also depends on how you drive your car and how often you change the oil / filter.
I have used Shell Helix Ultra synthetic (5W40, A3/B3/B4) oil in my Boxster S - and Shell motorcycle oils in my bikes too - for years with great results. They make a good product but I don't know how available Shell products are in North America.
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2001 Boxster S (triple black). Sleeping easier with LN Engineering/Flat 6 IMS upgrade, low temp thermostat & underspeed pulley.
2001 MV Agusta F4.
Last edited by Steve Tinker; 08-30-2011 at 05:21 PM.
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