125tdi woeful fuel economy, help!

[Greg Roles]

For the record no VNT 17 is going to produce safe boost beyond 24 psi, any more is a spike or an inaccurate or improperly dampened boost gauge. You have to jump up into GTBs to get into sustained 26psi plus.

[entice]

Best I've managed on a trip is 4.8L/100Km's on the MFD. 2012 125TDI Passat wagon.
Estimated range was showing around 1400km's. Car had 40K Km's on the clock at the time... I've found that oil age definitely makes a difference....(anecdotally)

[Ryeman]

I get ~ 1K out of the 62L tank in the country @ <100kph.

[bluey]

Yeti 103TDI lifetime average fuel consumption over 40,000km is 7.33L/100km mixed motorway and city driving. The MFD lies - I think about 10% optimistic. Fuel consumption has improved over the first 20,000km starting from mid-high 7s, presumably due to expected compression improvement with use.

With lots of short trips, I'd expect worse fuel consumption. Depends on how short the short trips are.

Are you using a cetane improver?

[Ryeman]

For me no additives.