91 Or 95?

[TomTom55]

So I have had a new 4 speed, no clutch and have had it for about 4 months now. I am not certain what is best for it petrol wise, 91 or 95? I have asked a few vendors, people at the petrol station and a few Thais, I get conflicting answers. When I use different types you can feel and hear a difference that is for sure, so what is best for it do you think?

[commande]

Easy answer, whichever you think feels and sounds best, I assume the 95 runs better as it reduces the possibility of pinging on high compression engines. I generally though only run 91 as I don't have any pinging issues on my bike or car.

[Khun Watchaporn]

91 may cause pinging/detonation.

for 2b a liter more or whatever the difference is I just use 95.

[BSJ]

It's a no brainer, 95

[loserlazer]

No problems to use 91 for an auto clutch 125cc bike. No need to pay 5 thb extra for 95 per lit means you get a free liter for every 6 liters if you use 91.

Edited May 9, 2013 by loserlazer

[Khun Watchaporn]

You can also continue to use your tyres until they are 1.69mm from the rim. It will save you 0.34b per km overall.

Edited May 9, 2013 by Khun Watchaporn

[Wong!]

A no brainer, 91, which is what the bike was designed to run on and what it specifies in the owner's manual.

[ClareQuilty]

91 is fine, just don't use gasohol.

[Khun Watchaporn]

A no brainer, 91, which is what the bike was designed to run on and what it specifies in the owner's manual.

My bike has that.

But it pings when running 91, just like most others who have the same bike. (2011 Honda). 95 it doesn't.

What's the no brainer about using 91 again?

Edited May 9, 2013 by Khun Watchaporn

[TomTom55]

This is my dilemma as well, on my fuel gap it has a 91 sticker, but I think I have heard it ping slightly whilst using 91. Then I have conflicting opinions from friends, people in the trade and now here Also, when using 95 it does seem a little more of a noisy bike considering it is pretty new and as it has been said it noticeably runs out quicker.

A no brainer, 91, which is what the bike was designed to run on and what it specifies in the owner's manual.

My bike has that.

But it pings when running 91, just like most others who have the same bike. (2011 Honda). 95 it doesn't.

What's the no brainer about using 91 again?

[ALFREDO]

91 is fine, just don't use gasohol.

Is not all now mixed with Ethanol, so is Gasohol, at least 5% and 10% E 20%? Except BENZINE for now 45 Baht.

[Sydebolle]

It's like buying very cheap engine oil for a vehicle you've just spent an extraordinary fee for those special car plates of yours ......

[BirdsandBooze]

91 is fine, just don't use gasohol.

Is not all now mixed with Ethanol, so is Gasohol, at least 5% and 10% E 20%? Except BENZINE for now 45 Baht.

I seem to remember someone posting that Benzine 95 also contains ethanol, at 5% of it's volume.; gasohol 91 and 95 contain 10%.

[TomTom55]

yarg! so 91 or 95! lol...

[VocalNeal]

It's like buying very cheap engine oil for a vehicle you've just spent an extraordinary fee for those special car plates of yours ......

The price of fuel has little to do with the quality or suitability of the fuel. As we all know the only difference is the octane rating. 95 burns slower than 91 that is all.

Riding style could cause pinging/pinking/detonation. Lugging the engine in higher gears, rather than changing down to a lower gear. This is not possible in CVT scooters but is common on a semi-auto. I.E. Riding in 3rd gear, slow down for a speed bump and then lug the motor using the auto clutch to compensate for the incorrect gear.

Another cause of detonation or pinging/pinking could be the spark plug so look in the owners manual for the recommended grade. For the NGk recommendation, whatever the number is, say 6, change the plug to to a "colder" one with one number higher so a number 7.

In the real world if you are happier with 95 use 95. If happier with 91 use 91.

EDIT: As is sometimes the case in posts like this we may discover the OP only buys his fuel from one station, so there maybe problems there. A friend of mine always had problems when he filled up at PTT. Not a bike but...

Edited May 10, 2013 by VocalNeal

[Wong!]

A no brainer, 91, which is what the bike was designed to run on and what it specifies in the owner's manual.

My bike has that.

But it pings when running 91, just like most others who have the same bike. (2011 Honda). 95 it doesn't.

What's the no brainer about using 91 again?

My 1982, 2011 & 2013 Hondas all run fine on 91, just like everyone else I know who uses 91.

[Khun Watchaporn]

A no brainer, 91, which is what the bike was designed to run on and what it specifies in the owner's manual.

My bike has that.

But it pings when running 91, just like most others who have the same bike. (2011 Honda). 95 it doesn't.

What's the no brainer about using 91 again?

My 1982, 2011 & 2013 Hondas all run fine on 91, just like everyone else I know who uses 91.

I thought you were on about using what bikes were 'designed to run on and what it specifies in the owner's manual'.

Such as my 2011 Thai Honda (and many others of the same model, reported on forums) which then ping/engine knock/suffer detonation while running on the spcicified Thai 91 octane

Of course it could be down to Thai petrol being utter <deleted>, and being god-only-knows-what.

Edited May 10, 2013 by Khun Watchaporn

[sotsira]

The question the OP should be asking is whether to be using benzine or gasohol ?

Benzine 91 is not the same as Gasohol 91

Benzine 91 will run much more efficiently and is the 91 octane recommendation stated in

the users manuals that most posters are referring to in this thread.

Gasohol 91 is a completely different fuel and will cause detonation (pinking) and also under powering

to your engine.

Problem is many gas stations have recently stopped selling Benzine and have solely reverted to gasohol

which is ok for modern car engines but not for small engined m/c's.

My recommendation is to use only Benzine 91 and if not easily accessible then use Benzine 95

which is an even better fuel that will make your engine run even more efficiently.

So avoiding all Gasohol fuels is the answer.

[thaicbr]

Op. What bike is it?

I have a Honda Cbr250 and the gf has a Honda wave 110i. Both run happily on 91-95 gasohol and E20. Just get what's available and cheapest.

Sent from my i-mobile i-STYLE Q6

[thaicbr]

The question the OP should be asking is whether to be using benzine or gasohol ?

 

Benzine 91 is not the same as Gasohol 91

 

Benzine 91 will run much more efficiently and is the 91 octane recommendation stated in

the users manuals that most posters are referring to in this thread.

Gasohol 91 is a completely different fuel and will cause detonation (pinking) and also under powering

to your engine.

 

Problem is many gas stations have recently stopped selling Benzine and have solely reverted to gasohol

which is ok for modern car engines but not for small engined m/c's.

 

My recommendation is to use only Benzine 91 and if not easily accessible then use Benzine 95

which is an even better fuel that will make your engine run even more efficiently.

 

So avoiding all Gasohol fuels is the answer. 

<deleted>. You are correct about slightly more mileage with non gasohol fuels. But ALL 2011 on bikes will happily run on gasohol.

Benzine has changed from red to yellow and you can usually tell by the price at 10b per litre more than E20.

Sent from my i-mobile i-STYLE Q6

[thaicbr]

Op. If it is a Suzuki Smash then Gasohol 91 or Benzine 91.

Your choice.

Sent from my i-mobile i-STYLE Q6

[TomTom55]

Op. If it is a Suzuki Smash then Gasohol 91 or Benzine 91.

Your choice.

Sent from my i-mobile i-STYLE Q6

Cheers, I will go for 91 then from now on and see how it turns out. Do you guys ever buy fuel from vendors and not a station? Sometimes if I am lazy I do but rarely.

[Khun Watchaporn]

Do you guys ever buy fuel from vendors and not a station?

That's fuel?

No, not unless it is a complete and utter emergency.

Edited May 11, 2013 by Khun Watchaporn

[TomTom55]

Do you guys ever buy fuel from vendors and not a station?

That's fuel?

No, not unless it is a complete and utter emergency.

Yea I always wondered what percentage of that stuff is actually fuel. Anyway just ridden my girlfriend to work and filled up with 91, sounds different and feels differently already, in a good way that is.

[ClareQuilty]

91 is fine, just don't use gasohol.

Is not all now mixed with Ethanol, so is Gasohol, at least 5% and 10% E 20%? Except BENZINE for now 45 Baht.

I seem to remember someone posting that Benzine 95 also contains ethanol, at 5% of it's volume.; gasohol 91 and 95 contain 10%.

Anyway 5% is less bad than 10%.

[VocalNeal]

TomTom55, on 11 May 2013 - 04:22, said:

Do you guys ever buy fuel from vendors and not a station? Sometimes if I am lazy I do but rarely.

Occasionally when I have either run out or been low on a long ride. Saw some bottles hanging on roadside stand so bought 4l, then made it to a real petrol station. Never noticed any difference. Don't forget locals buy from them, so if the fuel is always dodgy the locals won't buy it.

Watched some guys once at a local Shell station taking buckets of kerosene and pouring them into the main diesel storage tank. So even they are not immune from dodgy fuel.

Quote

I seem to remember someone posting that Benzine 95 also contains ethanol, at 5% of it's volume.

Oh well if someone posted it on TV then it must be correct. Did they give any reference for their theory?

Edited May 12, 2013 by VocalNeal

[Wong!]

The sticker on my Honda says to use 91 Gasohol of 10%.

I think Honda have more of an idea than some internet 'expert'.

[ClareQuilty]

The sticker on my Honda says to use 91 Gasohol of 10%.

I think Honda have more of an idea than some internet 'expert'.

That means it can tolerate gasohol. But, it doesn't necessarily mean that is the 'best' fuel for it...

[thaicbr]

The sticker on my Honda says to use 91 Gasohol of 10%.

 

I think Honda have more of an idea than some internet 'expert'.

That means it can tolerate gasohol.  But, it doesn't necessarily mean that is the 'best' fuel for it...

Well the "best" fuel may well be fermented whale blubber but unfortunately the Japanese have them all so I will stick with Bangchak petroleums E10 & E20:D:p:)

Sent from my i-mobile i-STYLE Q6

[Salapoo]

The sticker on my Honda says to use 91 Gasohol of 10%.

It says it 'can use', or it says 'to use'?

I have the same sticker on my bike, and it runs much better on 95.