Essentially, the gear indicator suggesting to drive the car around at under 1500 revs has more to do with emissions than anything else, i.e. low revs = low nox but higher soot output blocking the dpf, also injection is retarded to reduce nox, ergo efficiency drop due to this, altering this must be how the chip tuning gets better economy and power!!

 

A very interesting read, ignoring the sales pitch for their product.

 

http://www.hddeo.com/ImpactofSootinEngineOilonWear.html

Emissions are Important.

The Manufacturers seem to forget about Economy and Fuel used while getting low Emissions.

(other than publishing the fiction in brochures and adverts.)

 

Their EU Test Figures submitted from tests in Temperature Controlled Building on Rolling Roads with 1 representative vehicle which is the most basic model with no optional extras has nothing to do with driving that vehicle in the real world in real ambient temperatures 

over proper distances.

 

http://skoda.co.uk/pages/fuel-consumption-statement.aspx

Edited 24 June, 201510 yr by goneoffSKi

Emissions are Important.

The Manufacturers seem to forget about Economy and Fuel used while getting low Emissions.

(other than publishing the fiction in brochures and adverts.)

 

Their EU Test Figures submitted from tests in Temperature Controlled Building on Rolling Roads with 1 representative vehicle which is the most basic model with no optional extras has nothing to do with driving that vehicle in the real world in real ambient temperatures 

over proper distances.

 

http://skoda.co.uk/pages/fuel-consumption-statement.aspx

 

The emissions test cycle & test conditions are defined by the EU not the car manufacturers.

The figures they report in the test brochures are achievable in these conditions or they cannot print them.

Accepted they dont test every model variant just the ones that work best for the test but this is the same for every manufacturer & is the same for a long time so shouldnt be a suprise.

 

The problem with economy figures is how you "define" real world.

Take a look at fuelly for a vRS TDI and the figures range from 41 to 55 mpg.

Which would you use as the official figures?

I am not surprised in the slightest, just pointing it out because it is common knowledge, including common knowledge 

to the EU Commissioners, Government Transport Ministers etc, unless they are taken by Surprise.

 

They are defined by the EU.

They can be done by the Manufacturer and submitted by them.

 

Same Engines / Gearboxes, Drivetrain and Vehicle class from the Volkswagen Group.

The Heavier VW, Audi, Seat can be a VED class lower than the lighter Skoda because the manufacturer gave the Premium Brands a lower Co2 /km figure.

VORSPRUNG DURCH TECHNIK

Edited 24 June, 201510 yr by goneoffSKi

Essentially, the gear indicator suggesting to drive the car around at under 1500 revs has more to do with emissions than anything else, i.e. low revs = low nox but higher soot output blocking the dpf, also injection is retarded to reduce nox, ergo efficiency drop due to this, altering this must be how the chip tuning gets better economy and power!!

 

If I drive with the instantaneous fuel economy on the display, lower rpm gives me better economy figures if the road is flat & you are not trying to accelerate.

I don't think its affected by "emissions" targets.

 

Chip tuning companies usually just increase the boost pressure & perhaps increase the injected fuel on systems which are "flashed" into the ecu rather than just plugged in.

They make use of the fact that manufacturers calibrate the engines quite conservatively to protect the engine against all types of usage for the life of the engine.

Driving the car round in the UK, even when you drive very hard is not really "worst case".

The same engine must be safe for towing a heavy load for a long time in hot conditions or driving at high-altitude where the turbo has to work very hard.

Ignore the gear change indicator if the car is a 'keeper'.

 

Low speed / RPM + high gear / acceleration = high load / wear on the dual mass flywheel (DMF).

My DSG likes to keep the revs around 1500rpm under light load etc. As soon as I press the throttle a bit and the load is too high it changes down a gear or two.

 

A manual should be driven the same way. Sometimes you need to ignore the change indicator.

 

Phil