My Experience Moving Up A Grade (5W20 -> 0W30)

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Originally Posted By: ChrisD46
Perhaps might end up being a placebo effect - but as of today for now and for over a week I can tell the little Elantra 4 banger engine is simply not as "free feeling" and instead feels more restrictive when giving it the gas pedal running Mobil 1 0W30. Worse things to be concerned with though such as over filling , etc.
No it's not a placebo effect; one too many guys here are dull-sensed, post- romantic boors.
That mild insult out of the way, I can EASILY tell on the one-ton cars with MT but maybe not so much on the 2 ton plus with automatic. More at Rod and piston racket and clatter telltale with the latter.
Don't let ANY of the flat-earthers here make you believe you cant tell - they are secretly jealous of your senses and don't want to be missing anything important.
 
Switched back to Mobil 1 0W20: Same tank of gas , same route to work and back , etc. MPG jumped back up 2+ MPG , engine back to being more responsive and less sluggish on acceleration ... So much for plecebo effect I suppose .
 
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