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So does anyone know what the FSM recommends? Is it Synthetic or conventional? Also which one do you guys think would be better to use? I know technically synthetic is better than conventional but in some vehicles conventional is more than enough for the motor.
 

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I pretty sure its synthetic only, and must be DEXOS approved. I checked tonight actually and the new Mobil 1 has the logo right on the bottle.

My oil cap reads DEXOS right on it. Do you have the 2.4 or the 2.0?
 

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According to Buick, my Regal (Russelheim) came from the factory with "synthetic blend". Mobile One advertises as being "Factory Fill' for the Regals twin, the Opel Insignia.
 

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So does anyone know what the FSM recommends? Is it Synthetic or conventional? Also which one do you guys think would be better to use? I know technically synthetic is better than conventional but in some vehicles conventional is more than enough for the motor.
I to use Mobil One Dexos full synthtic 5w30 oil in my 2011. The factory fill is a syn. blend but to me the full syn will hold up better and the small extra cost is worth the warm and fuzzy feeling I get using the full synthetic version of the Dexos oil. LOL
 
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