Petrol or Diesel Engine VW Tiguan - 140TDI 162TSI?

[pallman]

Mine (140TDI) is still on first tank filled from dealership and my long term is 8.9
Even I rest the consumption still 8.7. I have a 10km patch on 100km/h every day on a 25 km journey each way. Definitely not happy with consupmtion.
Not sure why its so bad.

The only reason I bought TDI over TSI was consumption and here I am.

My Golf 2.0TDI mk 5, 2007 is now at 230,000km. The first 30,000km it averaged 6.5/100. It is now 4.9.

These motors take a long time to run in fully. Mine keeps improving with age/km's. oil consumption has also improved. Initially up to 100,000km it was needing 1 litre between 15k services. Now 1/2 litre.


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[theresanothersteve]

Here's a thought...

The economy on my Jetta suddenly jumped from 7.8 l/100 to 8.5 l/100 (I do a lot of hill's running). Couldn't work out why. Suddenly realised we are finally getting a hot summer. Now we've had a cooler week the consumption ha dropped.

I strongly suspect its linked to the aircon, struggling to do its climate control bit on very hot days but doing it easy when its mild.

[Aus_fas]

Next week, I plan to do three things:
1. Fill up my tank at BP
2. Tyre pressure to 37 PSI
3. Will do few test runs on 100km/h zone

Will report if there is any improvement.

Re: milage improvement after a while is bit strange to me as years ago one was required to go slow on engine as the engine hadn't completed the 'running' till 10,000. I assume new engines came already with that initial running.

Will report consumption next week.

I agree the weather is hot these days, will see on next fuel tank!

[tigger73]

New cars will improve fuel economy and power outputs over time. There's varying opinions on what the best way to run in a new car but the general consensus is not to run it at fixed revs for extended periods of time (i.e. no cruise control on the freeway).

My current car didn't get better economy until about 5,000km. It was rather lousy to start with. It is unusual to get anywhere near manufacturers figures straight away (these tend to be pretty optimistic in terms of real world driving).

[cjmifsud]

ad-blue

Something not mentioned in this thread (but it is in others) is the adblue requirement for diesel engines as well. In any case, for me, the 162TSI is miles better than the 140TDI. I would have loved to have compared the European bi-turbo diesel against the 162TSI (both 6.5 seconds 0-100) but the 140TDI just seemed lethargic. I would pick the 130TSI over it in a heart beat.

don't think the adblue consideration is all that of an issue. I have the gen 2 140TDI and love it. goes like a rocket when needed. adblue can be easily topped up at many BP and Shell services stations right next to the diesel fuel pumps. I paid 75c per litre for adblue the other day. So take into account maybe an extra $20-$30 per year for adblue.