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Old 04-18-2012, 09:50 PM   #11 (permalink)
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Location: Vancouver Island, Canada
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Dusty - '98 VOLKSWAGEN Beetle TDI
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On further reading in that last pdf i noted that with every 10 degree Celsius increase in turbo inlet air causes a reduction in fuel economy by 0.7%

I think that paper did not help my theory !
it did say that -10 to 45 c was their diesel motors optimal running temperatures. It could be they will perform poorly and use more fuel outside of those best working conditions.

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