My Yeti 2.0 140 4x4 has done about 1200 mls. It idles at 900rpm. Others have mentioned idling at 600 and 750 rpm. Is 900rpm too high? Or is the car programmed to reduce idle speed after a certain mileage? My useage is mainly rural runs and have been a litle disappointed by mpg of 39 and wonder if the idle speed could influence this? Overrun braking is somewhat less than I would expect.

A higher idle of 900 to 1K during colder weather is perfectly normal. When warm (temp dial in the middle) the idle should drop to 750-800.

Edited 27 February, 201313 yr by Hairball

Mine did around 39 for the first 3000 miles. It's slowly climbing and now getting around 41-42 at 8000 miles (average since new is now 41). I've never noticed it idling as low as others, probably similar to yours. Maybe Yetis can't get enough of good Yorkshire air and get a bit greedy!

VAG diesels often show a gradual improvement in fuel consumption as the mileage builds, sometimes quite noticeable after the first oil change. Fuel consumption is usually greater in winter, since the car takes longer to reach operating temperature, especially if you are taking heat to warm the cabin.

Edited 27 February, 201313 yr by Zib

VAG diesels often show a gradual improvement in fuel consumption as the mileage builds, sometimes quite noticeable after the first oil change. Fuel consumption is usually greater in winter, since the car takes longer to reach operating temperature, especially if you are taking heat to warm the cabin.

Why is that do you think?--I had a recent oil change at 10k and I thought the mpg was a bit better and the lump a bit more free revving--I put it down to a psychological effect rather than anything real as I don't keep tabs on the mpg with anything other than the system on the vehicle?

My Yeti 2.0 140 4x4 has done about 1200 mls. It idles at 900rpm. Others have mentioned idling at 600 and 750 rpm. Is 900rpm too high?

Same here – 2.0 140 4x4 and 900rpm.

Even went to the dealer to ask if thats normal - when driving slowly (lets say 20km/h) and using wrong gear (too high) so that revs are too low, the car accelerates (rises rpm's - until 900rpm is reached). That acceleration made me feel "slightly" unsecure. But the guy at the dealer said thats normal behaviour on these new VAG diesels...

Of course - that happened last autumn (less than 1000km on the clock) when I noticed the "acceleration", should try the same now, maybe it's different (something to do with the car being "raw"...? )

(Will try that again as soon as I can – the car belongs to my father and I haven't had a chance to drive it this winter... )

Edited 28 February, 201313 yr by Hirundo

Our 2.0 4x4 manual did idle a little high to start with and will certainly do so until warmed up. Then, unless regenerating should be around 750-800rpm.

The fuel consumption (measured tank to tank and not on the computer which on our car is approx. 10% optimistic) started at 42-43mpg and now after 2 years and 18000miles is 44-45mpg. My wife manages to achieve 55-63mpg on the computer, so around an accurate 50mpg when she drives; how she does it I don't know!

Over the 55k miles I've had Dewi my fuel consumption has averaged just under 47 mpg, taken on fill to fill mileages. That includes a couple of journeys to France and Cornwall with a caravan in tow. I regularly see 50+ on the Display going to work. It isn't difficult to do on the RIGHT sort of roads.

Dewi will idle at 900rpm when cold, but that soon settles down to around 750 once fully warm.

It isn't just the Yeti that sees a gradual improvement in consumption. Both of my diesel Freelanders showed a marked improvement once 25k had been reached.

Another note on idle speed. When the engine is warm AND the car is not moving the idle is ~750 RPM, when the car is moving the idle increases to 900 RPM.

My Yeti 2.0 140 4x4 has done about 1200 mls. It idles at 900rpm. Others have mentioned idling at 600 and 750 rpm. Is 900rpm too high? Or is the car programmed to reduce idle speed after a certain mileage? My useage is mainly rural runs and have been a litle disappointed by mpg of 39 and wonder if the idle speed could influence this? Overrun braking is somewhat less than I would expect.

My 110 normally idles at 800rpm but in colder weather it increases to 1000rpm. I think it's linked to the snowflake display as when it is lit it's 1000rpm, ulit 800rpm.

It also idles at 1000rpm when doing the DPF thingy.

Fred

In warm weather mine idles at 780 rpm,in cold weather it drops to 640 rpm.

Idle speed varies with the battery voltage as well as DPF regeneration. If the battery voltage is low, it will idle at higher rpm's to boost the output of the generator.

Why is that do you think?--I had a recent oil change at 10k and I thought the mpg was a bit better and the lump a bit more free revving--I put it down to a psychological effect rather than anything real as I don't keep tabs on the mpg with anything other than the system on the vehicle?

It probably wasn't psychological. My records for previous VAG diesels showed a gradual improvement, and one in particular improved quite noticeably after that first oil change. My guess would be that friction in the engine reduces slightly as the components bed in, and that first oil change flushes out microscopic particles of components which would contribute to that friction whilst they are there.