Changing from unleaded to premium gasoline

**mark_celiz09** · December 30th, 2013 04:06 PM

Hi,

I'm planning to change my fuel from unleaded to premium gasoline, what are the things to be considered? Do I have to change any parts on my car for this? I have a Honda Civic Lxi 97 car.

Thanks!

**K.I.L.L.** · December 30th, 2013 04:11 PM

Originally Posted by mark_celiz09

Hi,

I'm planning to change my fuel from unleaded to premium gasoline, what are the things to be considered? Do I have to change any parts on my car for this? I have a Honda Civic Lxi 97 car.

Thanks!

Why are you changing your fuel type? I don't think there would be an issue with the car you have.

**Walter** · December 30th, 2013 04:19 PM

All gasolines being sold here are now unleaded, regular or premium.

**mark_celiz09** · December 30th, 2013 04:23 PM

Originally Posted by K.I.L.L.

Why are you changing your fuel type? I don't think there would be an issue with the car you have.

I'm after the octane rating actually. I would like to observe if it will have a significant effect on my car's performance.

**mark_celiz09** · December 30th, 2013 04:24 PM

Originally Posted by Walter

All gasolines being sold here are now unleaded, regular or premium.

If that's the case, I think the gasoline companies should change how they brand their products.

So it means there is no issue if I change to unleaded to premium? No parts to be changed. :D

**bwiseat** · December 30th, 2013 05:35 PM

Originally Posted by mark_celiz09

If that's the case, I think the gasoline companies should change how they brand their products.

So it means there is no issue if I change to unleaded to premium? No parts to be changed. :D

Definitely no need to change parts.

**jhnkvn** · December 30th, 2013 11:57 PM

Originally Posted by mark_celiz09

I'm after the octane rating actually. I would like to observe if it will have a significant effect on my car's performance.

Octane isn't an indicator of gasoline energy density.

**Manilablock** · December 31st, 2013 12:27 AM

Siguraduhin mo lan na ung gas station ay hindi madumi ung gasoline nila (hindi binabaha, hindi hinahaluan ung tanke, etc.).

experience ko same brand, same type of gasoline, pag sa gas station A maganda performance, pag sa gas station B, poor performance. Kaya meron ako suking gas station, pag hindi maiwasan max na ung Php500 sa hindi suking gas station.

**dr. d** · December 31st, 2013 12:44 AM

naming of fuel grades is probably more simplistically related to octane rating.

octane rating is a measure of a fuel's ability to resist pre-ignition.
pre-ignition is precisely that: fuel ignition before it is supposed to do so, as dictated by the spark plug. pre-ignition can prematurely ruin an engine.
some engines have higher compression, in an effort to increase power output.
unfortunately, higher compression tends to pre-ignite a fuel. hence, the need for higher octane fuel in higher compression engines. using lower octane fuel in these engines can result in poor engine performance and shortened engine life.

so, if your question is, will i need to do engine adjustments if i want to use higher octane (premium grade) fuel than what the manufacturer recommends? the answer is probably, no. but it will probably be just an un-necessary expense.

**vinj** · December 31st, 2013 02:54 PM

It's basically knock resistance (octane levels). Some cars can get more power from higher gas octanes if the engines are tuned to higher parameters (i.e. timing advance) where regular fuel will encounter engine knock. In the case of Hondas, per my experience there's really no need to go for higher octane levels on their regular rides.