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Honda Jazz Mk2 2008-2015 / Rear side windows struggling to go up
« Last post by ChristoC on Today at 08:26:21 AM »
Hi
The side windows in the rear of my jazz are struggling to go up and down. 1 is slow and the other needs to be manually pulled up whilst pressing the button at the same time... is this run by a fuse!? advice appreciated!
thanks!
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Honda Jazz Mk3 2015 - / Re: Would the Mk3 benefit from premium petrol?
« Last post by peteo48 on Today at 08:26:12 AM »
I can't help feeling that if the benefit of 97/99 octane fuel was really as great as some people claim, then Honda would say something like "Recommended octane 97/99. Minimum octane 95", rather than let the vast majority of their customers drive around with a sub-optimal performance.

That's a very good point and some expensive cars often say premium recommended. The wording in Honda manuals (and also in Toyota) is "95 Octane or higher"

You can see why lawyers deal in semantics! What are they saying here? What does "or higher" mean? Anybody knows that you can put premium fuels in any car so why say "or higher?"

I don't think for one moment that 95 Octane from any supplier (like supermarkets) will do any harm but I wonder if there are benefits to be had. I bunged some Tesco Momentum in the car yesterday but it will be mixed in with whatever was left in by the dealer. Might go with, say, 3 tankfuls then go down to 95 and see if I notice anything.
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Honda Jazz Mk3 2015 - / Re: Would the Mk3 benefit from premium petrol?
« Last post by mikebore on Today at 08:02:20 AM »
I can't help feeling that if the benefit of 97/99 octane fuel was really as great as some people claim, then Honda would say something like "Recommended octane 97/99. Minimum octane 95", rather than let the vast majority of their customers drive around with a sub-optimal performance.
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Honda Jazz Mk3 2015 - / Re: Driving a CVT in snow
« Last post by culzean on Today at 07:42:46 AM »
In deep snow (10-15cms) I had to disable traction control to get up a 0.5km fairly steep hill. I was the second car up.  Otherwise with TC on, if you got stuck, it would not rev as TC stopped both driving wheels spinning - which was teh only way to get up. (Hump back bridge plus sharp corner ay bottom of hill meant gaining any speed before teh climb was impossible.

Took me three attempts to work out how to do it..

It is pretty common to disable traction control in snow  and mud,  even with winter tyres.  I always try to leave it on because it is all tied in with Vehicle Stability Assist and it helps control skids but sometimes it is the last resort to press the 'off' button.
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Honda Jazz Mk3 2015 - / Re: Would the Mk3 benefit from premium petrol?
« Last post by culzean on Today at 07:38:07 AM »
I switch between 95 and Super (97?....not seen 99 on a pump).

Tesco do 99 and I tried it once (we were passing the Tesco garage) when going to Wales with full load of passengers and luggage in the Civic, it just flew up those welsh mountains and even the steep and bendy road up to Harlech castle no bother,  went up in a higher gear than I thought it would.   There is actually less power 'contained' in higher octane because the additives to raise the octane either don't burn or are less powerful (ethanol) but by being able to advance the spark the engine can make much better use of the fuel.  I tried high octane in one of my older motorbikes and it actually ran worse because with timing set for lower octane and no ECU / knock sensors it could not move the spark around.   The closer the spark fires (retarded to stop knocking) to top dead centre of stroke the less time the charge has to burn properly and the more of its force is wasted.  If spark fires too early (advanced) with lower octane the expansion of the igniting charge raises cylinder pressure and causes the lower octane around the edges to explode before it should,  it then tries to push piston down the same way it just came up without passing TDC,  the forces are large and that is why pinking / knocking can wreck your engine in very short order - by trying to reverse crankshaft every time a cylinder fires.
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Honda Jazz Mk3 2015 - / Re: Driving a CVT in snow
« Last post by madasafish on Today at 06:44:09 AM »
In deep snow (10-15cms) I had to disable traction control to get up a 0.5km fairly steep hill. I was the second car up.  Otherwise with TC on, if you got stuck, it would not rev as TC stopped both driving wheels spinning - which was teh only way to get up. (Hump back bridge plus sharp corner ay bottom of hill meant gaining any speed before teh climb was impossible.

Took me three attempts to work out how to do it..
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Honda Jazz Mk3 2015 - / Re: Would the Mk3 benefit from premium petrol?
« Last post by peteo48 on February 23, 2018, 10:47:12 PM »
Just on price - re Jocko's post - I notice that the price premium on Tesco and Sainsbury's "super" fuels is 5 pence a litre but the brand names all charge 10 pence a litre extra. I wonder why that is. Tesco claim that their Momentum fuel has additional additives over the 95 Octane.
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Honda Jazz Mk3 2015 - / Re: Would the Mk3 benefit from premium petrol?
« Last post by Jocko on February 23, 2018, 10:31:47 PM »
I tried Shell V Power in my Mk 1 and felt the car ran a bit smoother. There was a slight improvement in fuel economy but felt the 68p a gallon extra, I was having to pay, did not make it a viable option.
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Honda Jazz Mk3 2015 - / Re: Would the Mk3 benefit from premium petrol?
« Last post by 123Drive! on February 23, 2018, 09:49:32 PM »
I have a MK2 i-Shift and have only driven on normal petrol until summer of 2016, I was driving on a long journey and so have a go at Shell V-Power. Wow! The car is so much powerful and holds at a certain gear before changing to a higher gear thereby giving more power. Also a small notice of about  2 miles extra per tank. If you join the Shell Club, you get a voucher every 4 months and it pays back the extra costs. I have never gone back to standard petrol unless I can't find a Shell nearby. I have also used Tesco premium petrol and find it good as well and the extra few pence, definitely worth it. My pupils, I am driving instructor, noticed when I filled with standard petrol. So it's not just me being sensitive!

Try it and see how it goes! Have fun.
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Honda Jazz Mk3 2015 - / Re: Would the Mk3 benefit from premium petrol?
« Last post by mikebore on February 23, 2018, 09:46:20 PM »
I switch between 95 and Super (97?....not seen 99 on a pump). I have not seen difference in fuel consumption (I keep pump to pump records) and for performance don't think I could pass a "blindfold" test...ie say which fuel was being used without knowing.

For years I believed that if it didn't pink there was no benefit in higher octane, BUT, as I understand it most modern engines automatically adjust the timing to just avoid pinking. If this is the case there is a technical reason why performance/economy might be better with higher octane, but I have not been able to detect it.
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