How long does mixed fuel last?

[Pinkfoot]

British Petroleum say

 

"BP ULTIMATE OCTANE 98 minimum

BP Ultimate is the highest octane retail fuel that BP has on the market. It has an octane rating between 98 and 100 and does not contain ethanol."

 

That is what I use.

 

H-A

 

Plus +1

[GardenKit]

Using any more than 95 octane is just a waste of money.

 

High Octane fuels do not contain more energy or burn hotter, so they do not produce more power.

 

The octane rating is the fuels resistance to knocking. Knocking is the ratty noise you may have heard in your older car (you won't hear it in a saw) when low octane fuel burns too quickly. High octane fuels burn slower and cooler, which is exactly what is needed to fully generate power in high compression engines, but in standard engines the burn is too slow and power is not developed,

 

The only time they will help performance is in a modified saw with higher compression (like some of Spuds)

 

If high octane is used in standard engines, not only will less power be developed, but the cooler burn can result in more oil fouling and carbon build up.

[Stubby]

Using any more than 95 octane is just a waste of money.

 

High Octane fuels do not contain more energy or burn hotter, so they do not produce more power.

 

The octane rating is the fuels resistance to knocking. Knocking is the ratty noise you may have heard in your older car (you won't hear it in a saw) when low octane fuel burns too quickly. High octane fuels burn slower and cooler, which is exactly what is needed to fully generate power in high compression engines, but in standard engines the burn is too slow and power is not developed,

 

The only time they will help performance is in a modified saw with higher compression (like some of Spuds)

 

If high octane is used in standard engines, not only will less power be developed, but the cooler burn can result in more oil fouling and carbon build up.

 

Yea but critically it contains no ethanol ........

[GardenKit]

Yea but critically it contains no ethanol ........

true..

[H-A]

Using any more than 95 octane is just a waste of money.

 

It is not the power I am after, it is the lack of ethanol.

 

BP Ultimate "hopefully" contains no ethanol.

 

I believe now some supermarket fuel contains 20% ethanol.

 

Carb diaphragms and fuel hoses don't like ethanol.

 

H-A

[GardenKit]

It is not the power I am after, it is the lack of ethanol.

 

BP Ultimate "hopefully" contains no ethanol.

 

I believe now some supermarket fuel contains 20% ethanol.

 

Carb diaphragms and fuel hoses don't like ethanol.

 

H-A

The government recently introduced the E10 limit to the Uk, which means that up to 10% ethanol can be added to UK fuel, but no more.

 

Power equipment such as saws will run on E10 but only just, and will need retuning as ethanol contains more oxygen than petrol, so engines will run weak, and hot and self destruct unless richened up.

 

But the government are also aware that many cars produced over 10 years ago are not E10 compatable, so they have not insisted that fuel contains 10%, in fact they would rather it did not, as the effect on the motor trade will be too great at present.

 

E10 will however be compulsory by 2017 when the numbers of older cars still on the road has been reduced.

 

One effect of ethanol is that it absorbs moisture, which makes it heavy, so it sits in the bottom of the fuel tank with the petrol on top. The 2T oil does not mix properly with the water laden ethanol, so when the saw starts up it is running on water laden, low oil, ethanol which is not good news for the engine, so always give it a bit of a shake before use.

 

As an Aspen dealer, I am fully aware of the problems caused by ethanol. In three years time nobody will want to use petrol. Aspen will become the norm.

[H-A]

This is what is in Tescos best petrol

 

Specifications | Momentum99 Benefits | Tesco Petrol Filling Station

 

Methanol%(v/v) 3.0

 

Ethanol%(v/v) 5.0

 

Iso-propyl alcohol%(v/v) 10.0

 

Iso-butyl alcohol%(v/v) 10.0

 

Tert-butyl alcohol%(v/v) 7.0

 

Ethers (5 or more C atoms)%(v/v) 15.0

 

Other oxygenates%(v/v) 10.0

 

It gets worse:biggrin:

 

We may all be using alkylate petrol soon as you say, but what we need is another couple of brands, a bit of competition always helps the consumer.

 

H-A

[GardenKit]

We may all be using alkylate petrol soon as you say, but what we need is another couple of brands, a bit of competition always helps the consumer.

 

H-A

 

I am sure that will happen, but let us hope we all remain loyal to Aspen:big grin:

 

It is because of Anglo American Oil companies hard work in establishing Aspen that we have all become aware of the product and the benefits.

[Dan Earp]

I am sure that will happen, but let us hope we all remain loyal to Aspen:big grin:

 

It is because of Anglo American Oil companies hard work in establishing Aspen that we have all become aware of the product and the benefits.

 

And yours barry lol

[shavey]

but isnt this a very ignorant and rude thing to do by all bodies concerned for producing this fuel selling it to unsuspecting consumers basicly people who dont know about these stastistics who buy machines and have older precious machines that will sit there for months with this so called petrol ruining there engines then take them out and start them with stale fuel in the tanks it could be friends it could relations

 

I WAS IGNORANT TO THIS PROBLEM SIX MONTHS AGO

 

so somebody should take responsibility and warn the consumer about this problem when purchasing a new garden machine surely!!!

 

or a warning on fuel pumps that this petrol will damage your engine if not used within 1 month of purchase

am i barking up the wrong tree