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Old 18th May 2010, 22:31   #121
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If the engine uses a closed loop knock sensor based ignition timing setup, higher octane should show some performance improvement. Normally not enough to justify the higher cost.

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Old 18th May 2010, 22:55   #122
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@rk-sans - I got 548Km/29.8Litres = 18.6 Kmpl from the first full tank on 97(Got a service done during this tank-so may not be all that accurate) and then 573Km/28.7Litres= 20 Kmpl on the second.
Was this drive in City traffic or Highway run and what %age of AC usage.
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Old 19th May 2010, 07:39   #123
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@rk-sans - I got 548Km/29.8Litres = 18.6 Kmpl from the first full tank on 97(Got a service done during this tank-so may not be all that accurate) and then 573Km/28.7Litres= 20 Kmpl on the second. Unfortunately I had to tank up on IOC Premium on my last fill as Speed 97 was'nt available :( definite drop in driveability and the mileage seems to be hovering back around the 15Kmpl mark.
@ rk_sans
My driving is mostly in "Non Rush Hour" city driving, so slow moving traffic, but rarely jammed.
70% AC (I keep the ac on for 7-8 minutes, and then switch to blower only until it starts to get warm).

I'm comparing this to the fact that my average using other fuels was consistently ~15 Kmpl so its a 30% improvement.

Last edited by adisag : 19th May 2010 at 07:41.
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Old 10th October 2010, 23:10   #124
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Hello Adisag,
Any change in your observations during last 5 months? Any further improvements in mileage?
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Old 11th October 2010, 09:17   #125
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Hello Adisag,
Any change in your observations during last 5 months? Any further improvements in mileage?
I've settled into a routine of Filling up my tank with Speed97 (haven't been able to completely avoid the occasional 200 rs of regular petrol when I'm running low on fuel though)

In peak of summer (I was working late morning to late evening for a couple of months- so more rush hour travel as well) mileage was hovering between 17-18.

With cooler weather and my regular dawn till 3pm hours mileage is 19 with a light foot, but my regular route (MG road) now beckons the speed demons within, so more realistically I manage about 18kmpl.
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Old 17th January 2011, 16:15   #126
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Default Re: How does high octane fuel improve performance?

Does someone have any experience using the 93 Octane available in some selected IOC pumps in Delhi ?

Last edited by neeld : 17th January 2011 at 16:16. Reason: correction
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Old 17th May 2011, 16:04   #127
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Unhappy High octane fuel I am feelin the pinch

I have been using Shell premium fuel for over a year now on my swifty and with a TC upgrade i was feeling it better on the same fuel. Today when I did the regular fill I could feel the pinch when i saw the 78 bucks per liter on the bill.
Is there an alternative to Shell premium as far as the Octane level goes and competitive on the pricing after the recent increase.
I have been loyal with Shell premium but it has started to hurt.
Please advice.
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Old 17th May 2011, 16:35   #128
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Default Re: How does high octane fuel improve performance?

Modern cars like Ritz petrol ( CI 1:10) perform much better with higher octane petrol, especially better low end torque. So this should translate to better mileage.
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Old 17th May 2011, 22:14   #129
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Default Re: How does high octane fuel improve performance?

It would be nice if someone could list out the cars/ engines with and without knock sensors. Esp. of our volume sellers.

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Old 21st May 2011, 00:45   #130
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Default Re: How does high octane fuel improve performance?

I thought all modern cars with ecu has knock sensors.
Also for Bharat st IV compliance, is a wide band lambda sensor compulsory.
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Old 21st May 2011, 01:08   #131
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Default Re: High octane fuel I am feelin the pinch

Quote:
Originally Posted by Sportsmind View Post
I have been using Shell premium fuel for over a year now on my swifty and with a TC upgrade i was feeling it better on the same fuel. Today when I did the regular fill I could feel the pinch when i saw the 78 bucks per liter on the bill.
Is there an alternative to Shell premium as far as the Octane level goes and competitive on the pricing after the recent increase.
I have been loyal with Shell premium but it has started to hurt.
Please advice.
Try using octane booster. It will workout cheaper. You should get it at some performance store or some spare parts shop might be keeping it.
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