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Old October 22nd, 2019, 07:49   #8
IndigoBlueWagon
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Join Date: Aug 2004
Location: South of Boston
Fuel Economy: 50/45/37
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I adjusted the FE readout in the cluster in my '15 GSW using VCDS to 7% lower than it was reading. Pretty dead on now, maybe 1 MPG low for a full tank. There are instructions here somewhere on how to do it.

My BMW consistently reads 2-3 MPG low. And to the best of my knowledge I can't adjust it.

Honestly, I find the cluster FE readings annoying. I prefer to have a rough idea of how I'm doing by reading the fuel gauge, and then calculating FE when refilling. Less stressful.
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2002 Jetta wagon, 400K, RC3+; 1993 Mercedes-Benz 300D 2.5, 197K; 1997 Passat, 289K; '99.5 Golf, 260K; 2011 335d, 63K; 2015 Golf Sportwagen, 13K. Principal, http://www.idparts.com
Kid's cars: 2002 Golf TDI, 2002 Jetta TDI, 2015 Passat TDI SEL
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