E10 Petrol.

[ollie989898]

Not all manufacturers support the use of alkylate fuels- states in the manual for my chainsaw not to use alkylate as the carb will not be correctly set for it.

If you buy premium Shell V power petrol I believe it is 98 or 99 RON from memory, I know Tesco did a 99 back along. I don't know how much ethanol these contain, some I would guess. Given that most petrol in the UK contained ethanol for years I wouldn't worry too much.

I continue to buy V power for my garden equipment I just empty machines out before putting them away for the winter. I'm yet to be convinced fuel is knackered after 6 weeks in a plastic fuel can but I rarely have much hanging about in the garage anyway as I use it for the incinerator and I don't like fuel hanging about in case the kids happen to venture in the garage one day.

 

[Username_Required]

Not all manufacturers support the use of alkylate fuels- states in the manual for my chainsaw not to use alkylate as the carb will not be correctly set for it.

If you buy premium Shell V power petrol I believe it is 98 or 99 RON from memory, I know Tesco did a 99 back along. I don't know how much ethanol these contain, some I would guess. Given that most petrol in the UK contained ethanol for years I wouldn't worry too much.

I continue to buy V power for my garden equipment I just empty machines out before putting them away for the winter. I'm yet to be convinced fuel is knackered after 6 weeks in a plastic fuel can but I rarely have much hanging about in the garage anyway as I use it for the incinerator and I don't like fuel hanging about in case the kids happen to venture in the garage one day.

All premium fuels in the UK are E5 (but as I said above that doesn’t necessarily meant they contain any ethanol) and will be for the foreseeable.

I think the issue with alky will be the low density causing engine to lean off a little and the exhaust gas temperature to rise a little. There’s also a claim that these fuels can be a bit “drier” and cause increased valve/seat wear in some 4-strokes, they could easily be related to the same thing.

just need to follow the manufacturers advice really.

The fuel won’t be knackered after 6 weeks though, unless you leave the can open or it’s stored in a warm/hot place.

 

[Frankzy]

sorry, I wasn’t disputing claims around alkylate - I use quite a lot of it just not in my own machinery, but that the aspen website is just wrong - with pretty much every statement that they make.

I have looked through a few pages of their website and aside from the already mentioned environmental claims I can't spot anything in particular.
Mind giving an example?

If you were having headaches previously that may well be associated with carbon monoxide emissions, which increase dramatically as engines run rich (there’s not enough oxygen to complete combustion). Alkylate has quite low density, so on an engine that doesn’t have a lambda sensor it will run a little leaner, this helps things stay clean but you’ll use a little more fuel (by volume but not by weight) to produce the same power.

You're forgetting that carburetors are adjustable...
No, it was not running rich while on normal petrol.

 

[Username_Required]

I have looked through a few pages of their website and aside from the already mentioned environmental claims I can't spot anything in particular.
Mind giving an example?



You're forgetting that carburetors are adjustable...
No, it was not running rich while on normal petrol.

Sure, the description of the production route is incorrect.

Regular gasoline only contains a tiny concentration of benzene and PAHs too.

The residue (it’s not ash) that is left behind when you inappropriately burn a sample of petrol in an open vessel will actually be the additive pack that keeps the engine clean if the fuel is burnt properly.

alkylate does not burn more brightly in an combustion engine, you’ll struggle to see a flame at all in a petrol engine with either unless the engine is very rich and you can see the incandescence of the soot produced as a result.

Soot formation is a result of the air-fuel-ratio where the combustion is occurring, so vaporisation, mixing and admitting the right amount of fuel for the air-flow are more important than the composition of the fuel.

I saw a few others but that’s aenough

Two strokes normally run a bit rich of ideal, so I’d be surprised if it wasn’t.

 

[Username_Required]

Sorry if that sounded smug by the way, I just get a bit fed up with websites sometimes.

If they just said it was particularly suitable for garden equipment due to it’s stability, then that would be fine.

 

[essexpete]

I was wondering if a tiny drop of ATF would do the trick in my old 4 stroke ride on?

 

[Username_Required]

I was wondering if a tiny drop of ATF would do the trick in my old 4 stroke ride on?

It’s not quite my area, but I wouldnt be surprised if there’s a load of zinc anti-wear in atf, so I’d avoid mixing it into fuel.

 

[Bullring]

What if you mixed E5 and E10, would you end up with a happy medium E7.5.

 

[Exfarmer]

What if you mixed E5 and E10, would you end up with a happy medium E7.5.

Absolutely

 

[essexpete]

It’s not quite my area, but I wouldnt be surprised if there’s a load of zinc anti-wear in atf, so I’d avoid mixing it into fuel.

I have used it in diesel and sorted a hunting rotary pump.
Is the problem with zinc environmental or direct to the fuel system?

 

[Username_Required]

What if you mixed E5 and E10, would you end up with a happy medium E7.5.

you could if you wanted to,

I have used it in diesel and sorted a hunting rotary pump.
Is the problem with zinc environmental or direct to the fuel system?

Zinc compounds can cause deposits in fuel systems, particularly diesels funnily enough. They’re used deliberately for that purpose I’m some industry engine tests.

I’m the lawnmower case though I’d be concerned as the jet will be brass and likely to corrode as a result.

I’ll ask one of my mates what’s in it, but my guess is ZDDP.

 

[Username_Required]

…I’ll ask one of my mates what’s in it, but my guess is ZDDP.

just checked, typical they do contain zinc but not always.

 

[ollie989898]

The concern of water being in fuel is somewhat academic if the fuel is stored in a sealed vessel surely, particularly when you consider that engines ingest a lot of moisture because they are breathing incoming atmospheric air which is often loaded with water anyway.

 

[Username_Required]

The concern of water being in fuel is somewhat academic if the fuel is stored in a sealed vessel surely, particularly when you consider that engines ingest a lot of moisture because they are breathing incoming atmospheric air which is often loaded with water anyway.

the issue is more related to phase separation when the the ethanol mixes with water and an ethanol/water phase drops to the bottom of the tank, where the pickup is.

 

[Exfarmer]

The concern of water being in fuel is somewhat academic if the fuel is stored in a sealed vessel surely, particularly when you consider that engines ingest a lot of moisture because they are breathing incoming atmospheric air which is often loaded with water anyway.

Water in the intake air actually improve engine performance quite considerably. The water takes the heat of the combustion of petrol/ diesel and air which normally is dissipated by the radiator, this is converted to steam and considerably increases the power produced. I believe some aero engines were produced with water injection to make use of this

 

[Username_Required]

Water in the intake air actually improve engine performance quite considerably. The water takes the heat of the combustion of petrol/ diesel and air which normally is dissipated by the radiator, this is converted to steam and considerably increases the power produced. I believe some aero engines were produced with water injection to make use of this

In petrol engines it's used to cool the charge prior to combustion and therefore increase resistance to engine knock, so you can advance the ignition or increase boost, a water methanol mix was the ideal apparently.

Diesel water emulsion mixes were used for a little while, loads of claims made about efficiency but it was all a scam. Lots of people talking about organic rankine cycle systems for energy for the effectively reason you've mentioned, was even considered for F1.

 

[ollie989898]

In petrol engines it's used to cool the charge prior to combustion and therefore increase resistance to engine knock, so you can advance the ignition or increase boost, a water methanol mix was the ideal apparently.

Diesel water emulsion mixes were used for a little while, loads of claims made about efficiency but it was all a scam. Lots of people talking about organic rankine cycle systems for energy for the effectively reason you've mentioned, was even considered for F1.

Turbines using the Rankine cycle are still not that efficient unfortunately.

 

[Exfarmer]

Turbines using the Rankine cycle are still not that efficient unfortunately.

Sadly out of my knowledge

 

[Username_Required]

Turbines using the Rankine cycle are still not that efficient unfortunately.

Nope, but you can get a bit extra out of the exhaust heat on a big diesel

 

[ollie989898]

Sadly out of my knowledge

Many nuclear power plants use the rankine cycle or a variant thereof. Their modest outlet temperatures (circa 300 degrees) mean an overall efficiency of about 30%. Water at 300 degrees isn't anything like hot enough for serious efficiency but with nuclear fuel being so cheap and energy dense, in practical terms they don't have much incentive to improve on it.