Made the switch from 0W-40 to 5W-40..
#1
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2009 C63
Made the switch from 0W-40 to 5W-40..
at my last oil change and looks like my MPG is not what it used to be.. On my regular work commute I'd hit 19mpg without really trying but now I'm at low 17 the past few days since the oil change..
Anyone else experience this? Does it take a little while for the car to get used to the new oil?
Anyone else experience this? Does it take a little while for the car to get used to the new oil?
#3
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Cant believe it would make much if any difference to fuel consumption, certainly not to the extent that the OBC could detect. Do you think your right foot could have become a little heavier, checking out whether the new oil has improved performance?
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2012 C63 Coupe
While it may be possible that your MPG has changed...I am wondering why someone with a high performance car with higher performance upgrades (ie EC tune, and BMC's) would be concerned with MPG's? There is a reason this car comes with a Guzzler tax and it is not because it is a conservative drinker!
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2009 C63
While it may be possible that your MPG has changed...I am wondering why someone with a high performance car with higher performance upgrades (ie EC tune, and BMC's) would be concerned with MPG's? There is a reason this car comes with a Guzzler tax and it is not because it is a conservative drinker!
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2015 C63S E1 (sold 2012 C63 AMG Sedan (Premium & APX)) & 09 C300 Sport 4Matic
Many OEMs now specify a multigrade oil as low as 5W-20 to improve fuel consumption once the car reaches operating temperature. High revving performance engines need a higher viscosity at the top end to protect from heat and improve the flash point.
The fact that you switched to 5W would make little difference in my opinion but the oil may be a little bit thicker.
The fact that you switched to 5W would make little difference in my opinion but the oil may be a little bit thicker.
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#10
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The first number is viscosity rating and the second number is the flash point. The difference between 0 and 5 weight is minor but manufacturers use 0-40w as it is thinner at low temps and heats up faster for better emmisions. As for engine life you're better off with 5-50w unless you live someplace very cold and you park outside.
#12
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The 0W40 is actually a little thicker at @ 100º C because it has a higher viscosity index.
0W40 Spec Sheet is 13.5 cSt @ 100º C
5W40 Spec Sheet is 13.2 cSt @ 100º C