What's a good rpm to shift to save fuel?

[Greg Roles]

If you are really serious, get a boost gauge. Whenever boost is rising, so is fuel use. It teaches you a LOT about smooth driving, and where the engine is most efficient. Changing up at low revs, and expecting the engine to cope with that under anything but gentle acceleration, and it will be bosting and using more fuel than you realise. I consider a boost gauge essential for any of the diesels equipped with a DPF, as any off boost efforts is producing DPF blocking soot.

Seems like a rational excuse for a cool mod to me!

[flat6]

Only problem is its hard to drive this car light, you just want to give it a squirt every time you take it out, only starts sounding good around 3 - 4k+ revs

But when im being a tight arse on the fuel doing the eastern fway in the morning to work, i usually try and keep it down revving as long as possible as you literally use no fuel on the down rev to about 1400rpm, below that it starts to use a bit of idling juice

Other than that its not bad, doing the fway/hoddle st run in bull**** peak hr traffic it consumes around 8.9 - 9.3L , and i see a lot of you guys out there to, fair few polo's do the morning run

[kaanage]

If you are really serious, get a boost gauge.
<snip>
Seems like a rational excuse for a cool mod to me!

Me too - I'm just loathe to start tapping/welding the exhaust manifolds while the cars are still under warranty (not to mention routing cables, mounting gauges...)
Do you think an ODB reading device that displays the inlet manifold pressure would do the job?

I can understand reigning in a GTi would be frustrating. For better or worse, I bought an econobox so that's how I drive it (outside cruises).