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Old 31st March 2009, 02:47   #1
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Exclamation Accord Average drops with xtra premium !

HI All,

This sounds weird but the avg. of my Accord has dropped ever since i've tanked it up twice with xtra premium .

Has this happened with anyone else here on the forums ? I've been filling from same pump since years and otherwise i was getting a regular avg. of 10.4 - 11.2 incity from Regular Petrol and now its 8.9 - 9.2 with xtra premium whereas i've been driving 70% on highways since last 2 top-ups !!!

Any ideas why this is happening ?

Thanks & Gold bless !
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Old 31st March 2009, 13:02   #2
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Its most likely that the Xtrapremium was adulterated... rather than something being wrong with the Xtrapremium formulation itself.

Another possibility is that the dispenser for Xtrapremium dished out lesser volume of fuel.

Last possibility is that since you have been using only regular petrol till now, the premium fuel cleaned out stuff, etc... but not sure if this can lead to a drop in fuel efficiency.
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Old 31st March 2009, 13:37   #3
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Actually what I think is that tweaked versions of petrol like xtra premium, power or speed, they are of a higher octane, so they give more power, but in the bargain u lose out on the fuel efficiency.
Atleast this hs been my observation on different vehicles like my civic, friends swift petrol and even my bike cbz-xtreme.
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Old 31st March 2009, 15:20   #4
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There's no chance of fuel being Adulterated as thats one of the best COCO (company owned, company operated) outlet in Delhi so it has to be something else. I always have used regular fuel on all my cars except my bike Karizma where i fill up Xtrapremium after 1st 500 KM and while it has been topped up thrice only due to low run, i did feel the change in sound, the better pickup with xtrapremium so not sure why it did'nt happen with Accord too.
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Old 31st March 2009, 15:35   #5
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^^^Nopes, they are higher in octane. And even if they are, that cant reduce your fuel economy.
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Old 31st March 2009, 17:06   #6
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I suggest that you try HPCL's Turbo.

HPCL are better with Premium Petrol and IOCL is better with Preminum Diesel fuels.
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Old 31st March 2009, 20:29   #7
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Higher octane fuel can help your engine only if your car is designed to make use of it. Octane number is not a magical performance marker. It just tells you how prone the fuel is to self combustion. Higher octane numbers allow higher compression ratios and advanced timings which extract more power from the fuel.

If you put in Speed97 in a M800, you are not going to see any performance improvement at all. However, put it in an M3, which can use that fuel, and you know what happens.

I highly suggest you read the posts by Dr. Sumit Bhatti in the following threads and dispel any misconceptions you have about Premium Fuels and how they differ from company to company.

http://www.team-bhp.com/forum/indian...s-fill-up.html (Best places to fill up)
http://www.team-bhp.com/forum/street...-stations.html (Short Fueling Tricks At Petrol Stations)
http://www.team-bhp.com/forum/techni...ty-diesel.html (How to ascertain purity of Diesel)

Use the search function to get to his posts in each thread. They are very informative.
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Old 31st March 2009, 20:48   #8
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Quote:
Originally Posted by Raccoon View Post
^^^Nopes, they are higher in octane. And even if they are, that cant reduce your fuel economy.
Oops... sorry, I ment to say the are NOT higher in octane. Omitted the "not" by mistake.
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Old 31st March 2009, 21:55   #9
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Quote:
Originally Posted by runeet View Post
Actually what I think is that tweaked versions of petrol like xtra premium, power or speed, they are of a higher octane
Quote:
Originally Posted by Raccoon View Post
Oops... sorry, I ment to say the are NOT higher in octane. Omitted the "not" by mistake.
I read somewhere that IOC's XtraPremium has a higher octane rating than IOC's regular petrol, but that BP's Speed and HP's Power do not. Or perhaps it was the other way around. And I can't remember where I read it! Very helpful, I know!
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Old 1st April 2009, 01:27   #10
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If the oil cos. are to be belived, all petrol is 91 octane. Speed 97 is of course the exception.
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Old 1st April 2009, 02:13   #11
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Quote:
Originally Posted by ImmortalZ View Post
Higher octane fuel can help your engine only if your car is designed to make use of it. Octane number is not a magical performance marker. It just tells you how prone the fuel is to self combustion. Higher octane numbers allow higher compression ratios and advanced timings which extract more power from the fuel.

If you put in Speed97 in a M800, you are not going to see any performance improvement at all. However, put it in an M3, which can use that fuel, and you know what happens.

I highly suggest you read the posts by Dr. Sumit Bhatti in the following threads and dispel any misconceptions you have about Premium Fuels and how they differ from company to company.

http://www.team-bhp.com/forum/indian...s-fill-up.html (Best places to fill up)
http://www.team-bhp.com/forum/street...-stations.html (Short Fueling Tricks At Petrol Stations)
http://www.team-bhp.com/forum/techni...ty-diesel.html (How to ascertain purity of Diesel)

Use the search function to get to his posts in each thread. They are very informative.
That's the truth right there. High octane is a TOTAL WASTE in a car that's not meant for it. Furthermore your emissions might increase and your mileage can drop. However I don't think the drop is significant as the OP posts.
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