Car & Bike Is Speed Petrol required for "Speed Petrol Only" Cars?

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kvikram

kvikram

Forerunner
I have a Honda City S 2009 Model, which is a "Speed Petrol Only" car. Is it really worth spending that extra 10rs per litre for speed petrol? I have mostly been using speed petrol thus far, but it seems to run fine on normal petrol too.
 
Does your owner's manual say Speed Petrol Only or Speed Petrol Recommended? If it says 'Recommended', lower octane petrol is OK but you will get slightly less performance. If it says 'Only', you should not use a lower octane petrol. It might damage your engine in the long term.
 
You can use normal petrol for Honda city, no need of wasting money on premium fuels like speed on that car.
 
kvikram said:
I have a Honda City S 2009 Model, which is a "Speed Petrol Only" car. Is it really worth spending that extra 10rs per litre for speed petrol? I have mostly been using speed petrol thus far, but it seems to run fine on normal petrol too.
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NO, switch to normal petrol.

whatsinaname said:
Does your owner's manual say Speed Petrol Only or Speed Petrol Recommended? If it says 'Recommended', lower octane petrol is OK but you will get slightly less performance. If it says 'Only', you should not use a lower octane petrol. It might damage your engine in the long term.
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SPEED petrol has nothing to do with OCTANE levels.
RS4 said:
You can use normal petrol for Honda city, no need of wasting money on premium fuels like speed on that car.
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Completely agree!!
 
The petrol variant that you are talking about, iinm it has the cleaning agents in it (forgot the exact name) which declogs the fuel injectors, thereby increasing the efficiency/performance. The speed petrol, if at all, should be used something like one tankful after 2-3 tankfuls of reg petrol.

Continuous usage of speed or similar variant of fuel will render its performance boosting effects useless.
 
Spacescreamer said:
The petrol variant that you are talking about, iinm it has the cleaning agents in it (forgot the exact name) which declogs the fuel injectors, thereby increasing the efficiency/performance. The speed petrol, if at all, should be used something like one tankful after 2-3 tankfuls of reg petrol.

Continuous usage of speed or similar variant of fuel will render its performance boosting effects useless.
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i would suggest 1 or 1/2 tankful after 20 tankfuls!
 
All petrol sold in India is now officially 91 Octane (RON91). Speed is also available in higher octane versions, but the basic fuel sold as Speed (without a number after it) is RON91 with some additives to enhance fuel economy and engine smoothness (sic).

In the past there was some differentiation because some 'premium' fuels were RON91 - this was when the country was still on RON89 and had not migrated to Euro3 emission norms. It is impossible to meet those norms with anything less than RON91. RON93 and 95 should be used only by engines which are tuned for higher RONs. Almost all cars upto the Rs. 30-35L bracket run on RON91.

Premium fuel does enhance performance *if your engine manufacturer recommends it*. It does have some benefits (fuel economy is *not* one of them) but should not be used unless clearly stated that it is OK to do so. Additives may clog some injectors and standard operating procedure is to run without. That said, I ran my Opel Corsa very hard for eight years, four of those on additive-enhanced fuel (the manual stated that this would improve performance), and when it was sold the engine behaved exactly the way it did on day one. OTOH my T-Jet forbids the use of premium fuel and I run on regular.
 
cranky said:
All petrol sold in India is now officially 91 Octane (RON91). Speed is also available in higher octane versions, but the basic fuel sold as Speed (without a number after it) is RON91 with some additives to enhance fuel economy and engine smoothness (sic).

In the past there was some differentiation because some 'premium' fuels were RON91 - this was when the country was still on RON89 and had not migrated to Euro3 emission norms. It is impossible to meet those norms with anything less than RON91. RON93 and 95 should be used only by engines which are tuned for higher RONs. Almost all cars upto the Rs. 30-35L bracket run on RON91.

Premium fuel does enhance performance *if your engine manufacturer recommends it*. It does have some benefits (fuel economy is *not* one of them) but should not be used unless clearly stated that it is OK to do so. Additives may clog some injectors and standard operating procedure is to run without. That said, I ran my Opel Corsa very hard for eight years, four of those on additive-enhanced fuel (the manual stated that this would improve performance), and when it was sold the engine behaved exactly the way it did on day one. OTOH my T-Jet forbids the use of premium fuel and I run on regular.
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If I understand you correctly, these are the versions of petrol available in India?

Regular - 91 Octane
Speed - 91 Octane + Additives
Speed 93 - 93 Octane + Additives
Speed 95 - 95 Octane + Additives
 
Thanks for the inputs guys. My car's fuel tank cover says "91 RON/ROZ MIN". So since regular petrol is now 91 RON, I guess it should be just fine!
 
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