Author Topic: Best fuel economy (Diesel, Manual)  (Read 499 times)

0 Members and 1 Guest are viewing this topic.

  • *
  • Posts: 8
  • it Italy
    Milan
Best fuel economy (Diesel, Manual)
« November 07, 2019, 08:55:15 »
Hi everyone,

In my old car (Chevy Aveo 1.2 LPG) 5th @ 2000rpm (70Km/h) was the sweet spot.

I was wondering if anybody tested the i30 D (manual) for the best gear/speed (revs) point for such an engine.

Regards.


  • 2017 PDE 5 Door Hatch, Diesel 1.6lt, Manual, Grey

Re: Best fuel economy (Diesel, Manual)
« Reply #1 : January 08, 2020, 03:51:30 »
I'll answer myself.

My car's engine looks most efficient (fuel friendly) around 1250 rpm.  The obvious reply would hence be:   75Km/h in 6th gear (3.5L/100Km on level ground)

This is where the turbo can generate just enough pressure to increase efficiency but is not boosting wildly towards peak power.  This sweet spot also happens to be in the beginning of maximum torque range;  makes sense.
  • 2017 PDE 5 Door Hatch, Diesel 1.6lt, Manual, Grey

  • *
  • Laughter is the best medicine. .
  • Posts: 66,182
  • au Australia
    Devonport Tasmania
  • Best Car Forum on the Net
Re: Best fuel economy (Diesel, Manual)
« Reply #2 : January 08, 2020, 04:23:14 »
Sorry you didn't get any response the diesel has been a much slower seller in the PD .. Seems the 1.6 T petrol is now the engine of choice with enthusiasts. Not taking anything away from the 1.6 diesel though. I'm a big fan since having one in a series 1 2008 model.

I'm surprised the sweet spot is that low. I would have thought 1800 Rpm would have been more like it?
 :undecided:
  • '19 Hybrid Camry & '19 Kona Active 1.6 (Prev had four i30's incl SR and CRDi)

 


anything
SimplePortal 2.3.5 © 2008-2012, SimplePortal