97/98 RON better the E10?

[pleasant]

2 hours ago, Witterings said:

On 18/05/2023 at 19:34, pleasant said:

If you have been running a machine on pump fuel (with ethanol or not) then running the same machine on aspen can ruin the carb diaphragms so be careful doing what you suggest.

 

I was sceptical as to why this would happen and just spoke to a dealership who do extensive servicing as well and they confirmed it.

I am very pleased you now believe what I stated....and as a dealership myself I am also pleased another dealership also knows this issue 😇

Edited May 19, 2023 by pleasant

[Witterings]

4 hours ago, pleasant said:

I am very pleased you now believe what I stated....and as a dealership myself I am also pleased another dealership also knows this issue 😇

 

It wasn't disbelief .. it was just the 1st time I'd seen a comment along those lines and you often get people in forums who don't really know what they're talking about making a comment for the sake of it so thought I'd check it out.

 

Now this is where I have egg on my face  ... I missed your sign off of  22 years+ Garden Machinery Main Dealer ...

So I look like the numpty now 😄

 

Seriously though, a BIG thank you for mentioning, could save me from an expensive mistake and really appreciated  👍

[pleasant]

No worries. It was said in jest. Good luck

[cyberstag]

I have a question for the knowledgable on here with regard to fuel for a Stihl 041AV. This saw would be probably 50 years old and still runs fine. I am currently using E5 petrol and oil at 45:1 as I think 50:1 is not enough oil. would there be any different requirement in these old saws?

If anybody has access to Stihl serial numbers to age the saw that would be great, number is 5267355

Thanks

[Stubby]

On 18/05/2023 at 19:34, pleasant said:

If you have been running a machine on pump fuel (with ethanol or not) then running the same machine on aspen can ruin the carb diaphragms so be careful doing what you suggest.

Its not really the alkylate fuel ruining the rubber components . All its doing is showing up what the pump fuel has slowly been doing . As you know if you run a machiene on alkylate fuel from the get go there are no problems . The rubber components have a coating on them to keep them supple . The pump fuel slowly attacks the rubber removing the coating but because it is attacking the rubber it stays supple until it eventually disintegrates . Because alkylate fuel does not attack the rubber , if you use it after prolonged pump fuel use its coating is gone and it becomes brittle . Thats why some people think its the alkylate fuel causing it but its not .

[Muddy42]

16 hours ago, Stubby said:

Its not really the alkylate fuel ruining the rubber components . All its doing is showing up what the pump fuel has slowly been doing . As you know if you run a machiene on alkylate fuel from the get go there are no problems . The rubber components have a coating on them to keep them supple . The pump fuel slowly attacks the rubber removing the coating but because it is attacking the rubber it stays supple until it eventually disintegrates . Because alkylate fuel does not attack the rubber , if you use it after prolonged pump fuel use its coating is gone and it becomes brittle . Thats why some people think its the alkylate fuel causing it but its not .

 

I might be wrong, but don't modern two stroke engines use more advanced materials (in the fuel line/impulse line/carb diaphrams) than older machines?  This is why the manuals say you can use pump fuels below a certain ethanol content.  I still keep an eye out for fraying or cracks.  Its annoying that esso premium fuel now contains 5% ethanol.  One day I might start removing the ethanol with coloured water.

 

[Stubby]

2 hours ago, Muddy42 said:

 

I might be wrong, but don't modern two stroke engines use more advanced materials (in the fuel line/impulse line/carb diaphrams) than older machines?  This is why the manuals say you can use pump fuels below a certain ethanol content.  I still keep an eye out for fraying or cracks.  Its annoying that esso premium fuel now contains 5% ethanol.  One day I might start removing the ethanol with coloured water.

 

Probably , but its not the ethanol attacking the rubber its the petrol itself . All the ethanol does is attract moisture as it is hygroscopic . 

[pleasant]

On 27/01/2025 at 18:16, Stubby said:

Its not really the alkylate fuel ruining the rubber components . All its doing is showing up what the pump fuel has slowly been doing . As you know if you run a machiene on alkylate fuel from the get go there are no problems . The rubber components have a coating on them to keep them supple . The pump fuel slowly attacks the rubber removing the coating but because it is attacking the rubber it stays supple until it eventually disintegrates . Because alkylate fuel does not attack the rubber , if you use it after prolonged pump fuel use its coating is gone and it becomes brittle . Thats why some people think its the alkylate fuel causing it but its not .

I don't disagree with your more accurate and in depth comment, but bear in mind the majority of my customers are of the 'weekend warrior' type with zero mechanical skills and little or no experience of using machinery such as ours. I find my comment to them is easier to grasp, retain, is shorter to keep interest and allows us to up sell Aspen. If I were to use your explanation, although absolutely correct, I would just be watching their eyes slowly glaze over, as all they want to do is leave and crack on in their gardens on a Saturday afternoon. 😂😇

Edited Tuesday at 20:08 by pleasant

[Stubby]

11 hours ago, pleasant said:

I don't disagree with your more accurate and in depth comment, but bear in mind the majority of my customers are of the 'weekend warrior' type with zero mechanical skills and little or no experience of using machinery such as ours. I find my comment to them is easier to grasp, retain, is shorter to keep interest and allows us to up sell Aspen. If I were to use your explanation, although absolutely correct, I would just be watching their eyes slowly glaze over, as all they want to do is leave and crack on in their gardens on a Saturday afternoon. 😂😇

Sorry 🙂

[peatff]

On 27/01/2025 at 16:40, cyberstag said:

I am currently using E5 petrol and oil at 45:1 as I think 50:1 is not enough oil

How do you measure 45:1 ? My 40:1 for the scooter is as close as I can get.