Re: CVT / Fuel economy discussion
Posted: Sun Jan 12, 2014 3:49 am
Let it out quickly with the engine at high RPM.
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Stodge wrote:What do you mean by "dump the clutch"?
Yup.~tc~ wrote:Let it out quickly with the engine at high RPM.
referring to 2.5l Skyactiv autoThe claim is 6.6 litres per 100 kilometres, and, while nailing that target may be the stuff of fancy, it'll sit below 9-10L/100km around town.
2.5l petrol SkyactivYou wouldn’t expect it to come anywhere near the diesels’ fuel consumption figures, so we were pleasantly surprised when the 6 returned 8.8 litres/100km
http://www.racv.com.au/wps/wcm/connect/ ... enza+sedanOur petrol Atenza got 7.6L/100km overall – against an official figure of 6.6L/100km – but we did get 6.7L/100km on a 768km run from Adelaide to Melbourne.
2.2l diesel, claimed economy 5.4l/100kmThe i-Stop fuel-saving system didn’t have a huge effect in our hands - the week we spent with the 6 was hot and humid, so while the engine would shut down, it wasn’t long before it re-fired (putting air-con as the priority). We agreed, but it meant 8.4 l/100km.
2.2l dieselThe result is power output of 129 kW at 4500 rpm and torque of 420 Nm at 2000 rpm. The wagon is good for a zero-to-100 km/h time of 8.6 seconds, though driving like that will lift it well above the official fuel consumption number of only 5.4 litres per 100 km.
During our test period we had it averaging in the low sixes on a mix of town work and motorway driving. That’s impressive for a car of this size and performance.
XLS - isn't clear on manual or CVTAt the end of our time with the car, however, fuel consumption was averaging 8.8 l/100km. That said, a lengthy period spent in peak-hour traffic saw fuel economy drop markedly, and a couple of spirited stints along winding roads didn’t help the cause.
But being able to switch it off means you can save a bit of fuel, which is important because we found it impossible to match the Kizashi's claimed 8.4l/100km - we got closer to 12l/100km.
2010 XL CVTAs for fuel consumption, additional kilometres under the belt may prove to put the Kizashi into a more favourable light. At present the average is sitting on exactly 9.0L/100km, which is less impressive than the quoted 7.9L/100km for both manual and CVT versions – although it is still substantially better than Mazda6 and Accord Euro.
That's called "riding the clutch". I knew a co-worker who complained to me that he had to replace his clutch twice in 2 years driving a bone stock Honda Civic DX. I then asked him if he rode the clutch. He gave me a blank stare. I then asked him to imagine he was driving and then just shift gears. I then asked where his left foot was after he released the clutch pedal. He replied, resting on the clutch pedal. I told him he was riding the clutch and even the light pressure of the foot resting on the pedal can cause slippage and premature clutch wear.Moto wrote: I knew one guy who went through three clutches because he drove with his foot resting on the clutch all the time. (I'm not even sure how he did it)
Very good points. I wonder how long the true clutchless manuals will be lasting? Since they do have an automatically engaged clutch.KuroNekko wrote:True, automatics are easier to deal with, especially in stop and go traffic. However, manuals are hard to beat when it comes to reliability and longevity. The part that takes most of the abuse is the clutch which is a wear item much like brake pads. Unless you are a horrible driver and/or often dump the clutch, your gears will last the life of the car. The only thing you'd have to do is replace the clutch at every 100,000+ miles and change the fluid. Automatic transmissions simply wear out over time due to the intricacies and heat that they generate. The cost of replacing an automatic transmission will usually offset the value of the car so that's why most people will junk them at very high mileage. Nearly all that cars that are still running with over 300,000 miles have manual transmissions for this reason. By that time, most automatic transmissions would have needed a replacement.