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Ive never noticed any difference in power or engine performance. Im a little curious about software though. I plan on getting the simon tool and AA tune from Jlevi when I do my taxes in January. I wonder if the change in software will have a positive or negative effect on the ticking. On another note I started my car this morning in about 32 degree F weather and didnt notice any ticking at all. I will update when I change to 5w40 as well.
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