Thackeray

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About Thackeray

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  • First Name
    William

Profile Information

  • Lexus Model
    IS300h
  • Year of Lexus
    2014
  • UK/Ireland Location
    Greater London
  1. That looks very likely. There's a youtube video showing what the test involves and it highlights how short and slow the test is. After looking at the video it's easy to see how a hybrid could spend much of the test running on battery, giving high mpg figures. The same test, which starts with the engine cold, could also give high carbon monoxide emissions. The video shows that some of the test is spent with the car stationary and the engine idling (if it's a conventional car). A hybrid car would probably stop the engine during these stops. As Comedian pointed out above, the catalytic converter needs to be warmed up before it starts removing carbon monoxide from the exhaust gases. But if the engine keeps stopping during the test, the cat won't warm up as quickly as in a conventional car. So the same test, being so short, could show unrealistic figures of both low fuel consumption (high mpg) and high CO emissions. I've now checked and found that Which? has recently updated its test explanation page to describe the new test regime that's due to be introduced soon. It's interesting to see that road testing is going to be introduced to improve the emissions data. I expect that was prompted by the VW saga.
  2. It's true that a lab gives you easier control over variables. But the test is only ever an attempted simulation of real-world conditions. If it's a badly designed test the results will bear no relation to the real world. This is the situation VW got themselves into. They designed cars to do well in the test. But as it turned out the cars did badly when tested on the road. Which? may have done a good job in improving on the design of the official lab test for conventional cars. But it's obvious that their test gives results that are wildly inaccurate for hybrid cars. They say the Prius does 166 mpg around town. I would be very surprised if any taxi driver driving a Prius 10 hours a day could get fuel consumption anywhere near this figure. In real world use, the best fuel consumption of the 2,600 Priuses on spritmonitor.de is 88 mpg. Average is around 54 mpg. The Which? test gets nowhere near to simulating these real world figures. Since the mpg figures are so clearly wrong, I'd be inclined to suspect that emissions data in the simulation will be inaccurate too. I expect they'll come up with a better designed test for hybrids in the future.
  3. For a long time I’ve been puzzled by the Which? magazine review of the IS 300h. In their initial report they made it a Best Buy but a few months later downgraded it. Its website version of the review currently says: “Best Buy award removed. It's a very good car, but we found the Lexus IS emits so much CO (carbon monoxide) in our tests, that it would fail to meet any EU emissions limits set this century. As such, we cannot possibly recommend it.” Despite this negative review, there were lots of things I liked about the car, plus some ratings that sounded impressive: Best in class for 2013 NCAP safety World’s most efficient production petrol engine when launched, at 38.5%. (It was overtaken by a Honda six months later.) Routinely at top of reliability ratings. I was also doubtful about the Which? mpg figures. Their claim of 97 mpg around town was obviously nonsense and the motorway figure of 34 mpg looked doubtful too. They say their tests are performed in a laboratory but they don’t give enough detail to tell how they get to these extreme figures. I thought if the carbon monoxide figures are based on the same testing, they’re just as likely to be wrong. So I went ahead and bought an IS300h. I’ve searched in the past for some other independent CO test reports and couldn’t find any. Until today. But first, what is Which? claiming? They say it wouldn’t meet EU carbon monoxide emission limits set this century. I take this to mean Euro 4 in January 2005. (There was Euro 3 in January 2000 but that was the last year of last century.) The limit for petrol cars under Euro 4 is 1 gram per kilometre (g/km) of CO. So they’re saying the IS300h emits more than 1 g/km. For a long time I had no way of knowing if that was true or not. But at last I’ve found a website that shows real-world emissions test results. It’s called EQUA Index and they test cars by driving them around real roads monitoring the emissions from the exhaust pipe on a three and a half hour run. They give the IS300h their top rating of A++. This represents a band from zero to 0.125 g/km of carbon monoxide. (Their result is for the 2017 model but I don’t think there are any significant differences to the engine from the 2013 model. Please correct me if I’m wrong.) By contrast, Which? says CO emissions are more than eight times this figure. I know nothing about EQUA; I’ve only just come across it. But I’m more inclined to believe that real-world testing on roads will give a more accurate figure than a short test in a laboratory.
  4. Thanks, that probably explains why I haven't seen it. On some other systems, Mercedes for example, they might give you a warning 30 days before the service and then count down the days until it's due.
  5. Thanks for that. Unfortunately, I can't find this section on my car. When I get to vehicle customisation on the central screen I only see options for doors and lights. Nothing for maintenance. When I look at the smaller display behind the steering wheel and choose settings, there is a section for maintenance. But the only option when I select this is Initialisation. I didn't try this as I assume it's what should be done when the car is serviced. I can't find anything about maintenance in my printed SatNav manual either. But I did find another version of the SatNav manual online (called IS+250+-+IS+300h+Navi_OM_53C71E.pdf) Here I can see that there's a section that lists a lot of things that need maintenance: engine oil, oil filter, rotation, tyre, battery, brake pad, wiper, LLC (don't know what that is), brake oil, ATE (?), service, air filter. But I can't get to this page on my car. Any suggestions?
  6. Many thanks. Will a message pop up on the car dashboard to say a service is due? I've been half expecting to see some sort of message but nothing has appeared yet. I've noticed on the 2017 model there's a mileage number next to a spanner symbol as one of the entries as you cycle through the odometer mileages. I assume that means the number of miles to go until a service is due. But I can't see anything like this on my 2014 model. Is there something comparable that I haven't been able to find?
  7. Reviving this old topic, I have a related question. Can anyone help? My car had an intermediate service a year ago, its third service. So it's now due a service in the next week or so. But it's some way off four years old and has a couple of thousand miles to go before it reaches 40,000. Which service is due? Intermediate, normal full service or 40,000?
  8. Many thanks for checking when the indicator cancels on your car. Sounds as though it's just the same as on mine. Thanks for taking the trouble to find out. I'd be interested to hear from owners of other makes of car to see if I'm right in thinking that indicator cancellation works properly on other makes. My guess would be that much of the Lexus development was aimed at the American market, where until recently I believe they had hardly any roundabouts. So no-one would have noticed the indicators cancelling too soon as you went round the roundabout. Maybe the same is true of Japan. If other owners can confirm that this is an oddity unique to Lexus, maybe I could start a new thread to campaign for Toyota/Lexus to fix the problem. I know it's only an irritation but there's no need for the irritation to be there at all. It's just bad design.
  9. You could be right that there's a fault. It would be good to know what other people's cars do. If they're different I'll then know to ask for it to be fixed at the next service.
  10. What happens on most other cars is that if you're indicating right and you turn the wheel from centre to the left (like when you enter a roundabout) it doesn't cancel. You often hear a mechanical click as you turn the wheel past some cog. Then when you actually make the right turn, turning the wheels to the right, the indicator is cancelled when you turn the wheels back from pointing to the right to pointing straight ahead. I can't remember any other car that doesn't do that. What I find irritating is that when I'm indicating right, the indicators are cancelled before I've even turned the wheel a fraction to the right - they cancel when I turn the wheel from straight ahead to the left, which is not the way you want them to work. Obviously, the car computer can tell that I haven't made the right turn yet.
  11. I do, too. It's irritating!
  12. While on the topic of indicators, I wonder if there's any way of getting rid of one of the very few niggles I have about the IS300h. The problem is that the indicators turn off when going round a roundabout before I've completed the manoeuvre. Here's what happens. I'm approaching a roundabout where four roads join. I want to leave at the third exit, effectively turning right. As I approach the roundabout I turn on the right indicator to show I'm going all the way round to the third exit. But as I enter the roundabout and turn the front wheels to the left to enter the roundabout, the indicators cancel. If I want the indicators to continue as I go all the way round the roundabout I have to turn them on again. When I get past the second exit, I switch to the left indicators. But my wheels are now pointing to the right as I drive round the roundabout. If I'm lucky the indicators won't turn off but I have a feeling that in some circumstances, the left indicators are cancelled a second time by the rightward turned front wheels. This is irritating. I don't think I've encountered it on mechanically operated indicator cancellation on other cars. Is there any way it can be adjusted?
  13. Rear Screen Demister

    It'll be interesting to hear what difference you find if you have climate control set to auto before pressing Demist. Hope it makes a difference. One other point to bear in mind is that the manual says: "Operation of the air conditioning system in Eco drive mode In Eco drive mode, the air conditioning system is controlled as follows to prioritize fuel efficiency: ● Engine speed and compressor operation controlled to restrict heating/cooling capacity ● Fan speed restricted when automatic mode is selected". So, as well as auto climate control, check that the car isn't in Eco mode - ie switch to Normal or Sport - before pressing the Demist button.
  14. Rear Screen Demister

    Sounds odd that you need to do that. If my climate control is on auto, when I press the demist button the air is directed to the windscreen and the fan speeds up automatically. The windscreen demists quickly. I wonder why your fan doesn't speed up automatically. Is it because you've changed the fan speed from the auto setting? Or is the air conditioning turned off? Or maybe the fan speed only increases when the engine has warmed up a bit. But that seems unlikely from what the RAC website says (mentioned in a link above) as even cold air will help. Another factor of course is that the screen should be clean. In days gone by, before air conditioning, people would wipe the windscreen to get rid of mist. But that just made it worse by putting specks of dust on the windscreen that the mist would stick to. Might be worth checking the air conditioning is working properly.My experience is that the whole car mists up if the air conditioning is turned off in wet or cold weather.
  15. Rear Screen Demister

    I noticed mine also doesn't seem to be as powerful as on some other cars I've driven. Maybe it's an economy measure. Does the rear screen stay misted if you have the air conditioning on, too?