One reason I use Aspen

[Dbikeguy]

At least we know the oil quality in the Husqvarna fuel is very high quality, from a company that produces thousands of two stroke machines, how many two stroke engines does Aspen produce?

That’s like saying how many engines do BP or Shell produce...

[Stubby]

8 hours ago, harvey b davison said:

If there's no noticeable difference between Aspen and husqvarna fuel, does the same apply to the stihl version. I'm wanting to switch to Aspen, but would be just as happy to use both the stihl and husqvarna varieties if they are all basically the same.

Aspen and Husqvarna fuel are both alkylate fuel which comes from close to the top of the refinery ( less of it so more expensive ) I am not sure if Motomix is an alkyate fuel from the same level in the refinery like the other two .

[Stere]

https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=12&ved=2ahUKEwjtubLYvJToAhWEY8AKHWbICFsQFjALegQIAhAB&url=https%3A%2F%2Fstatic.stihl.com%2Fsecurity_data_sheet%2Fdownloads%2FGB-0781-999-67007-871-0006_2016_12.pdf&usg=AOvVaw0R7JAGyuCbacx-VCu2qWeI

 

motomix data sheet mentions alkylate....

 

 

Info:

 

Google Translate

TRANSLATE.GOOGLE.COM

 

Edited March 12, 2020 by Stere

[Stere]

Theres some other rival brands of alkalyte in finland:

 

 

https://www.hintakaari.fi/metsuri-pienkonebensiini-2-tahti-5-l-ymparistoystavallinen-alkylaattibensiini/p/6418591054502/

 

PIENKONEBENSIINI NESTE 2-T 5L | K-rauta.fi

WWW.K-RAUTA.FI

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2-tahtisille pienmoottoreille suunniteltu polttoaine. Puhtaampien pakokaasujen ja pienemmän haihtuvuuden...

 

 

Edited March 12, 2020 by Stere

[Dan Maynard]

On the husqvarna site it says xp is for saws over 55cm3 . Some of my kit is smaller. Anyone know why they specify for larger saws?

I think I remember some people have had problems running 150Ts on aspen, they certainly need a retune. Bigger saws can just swallow it I think.

[peatff]

I had to open up the L screw a bit on my Husqvarna 135 using Aspen as it would not rev up from tick over.

[NickPC]

I bought some 4T and mixed Stihl HP red with it as normal pump fuel.

 

Put some in my HT75 pole saw, did not like it one bit..... Ran terrible straight away despite carb tuning, eventually stalled, refused to start and felt low on compression, I tested it to find it was 120psi down from 160 ish. Put standard fuel in and it started, ran normally and the compression recovered.

Tried it in a newly ported 026. Ran and idled ok, started to loose power after maybe six cuts... Killed it, pulled it over and it felt very low on compression..... Yikes. Standard fuel in and it recovered power, felt ok pulling it over and I've just looked into the bore to see it's fine and back to pulling +200 psi!

Bizzarre..... I was interested in it but not that much to risk saws, back to the ethanol fuel. Anyone any ideas? Oil type?

[peatff]

2 hours ago, NickPC said:

Bizzarre..... I was interested in it but not that much to risk saws, back to the ethanol fuel. Anyone any ideas? Oil type?

 

Demonic possession I reckon. How could it affect compression ? That would be there even with no fuel in.

[Rough Hewn]

I bought some 4T and mixed Stihl HP red with it as normal pump fuel.
 
Put some in my HT75 pole saw, did not like it one bit..... Ran terrible straight away despite carb tuning, eventually stalled, refused to start and felt low on compression, I tested it to find it was 120psi down from 160 ish. Put standard fuel in and it started, ran normally and the compression recovered.

Tried it in a newly ported 026. Ran and idled ok, started to loose power after maybe six cuts... Killed it, pulled it over and it felt very low on compression..... Yikes. Standard fuel in and it recovered power, felt ok pulling it over and I've just looked into the bore to see it's fine and back to pulling +200 psi!

Bizzarre..... I was interested in it but not that much to risk saws, back to the ethanol fuel. Anyone any ideas? Oil type?

That makes no sense whatsoever?
Alkylate petrol would not effect compression in that way.
Interesting....
[emoji848]

[Heavy Oil Saw]

Saving an ex grounds maintenance HRX537, none runner, used 4 stroke Stihl Motomix in 1l, and had it running within the day. Spark plug was defunct and magnet and coil pick ups rusted bad. Could not get it to tune at all though (back firing, hunting, unable to hold idle), went through the bottle and went and bought Aspen 4 in 5l. Topped up and began tuning, and had it tuned within 30mins (yes I’m slow, paid by the hour though [emoji23]). Cuts like a champ now.

At the same time got a bottle of 2 stroke Stihl Motomix for the strimmer, FS70, primed off bulb and started on choke second pull. It ran amazingly well and had more response on the throttle than on pump fuel mix.

Didn’t stink either, and lasts up to five years if stored correctly, no brainer for me really.

So I had a “bad” experience with the Stihl 4 stroke (there could of been other factors involved), but not the Aspen 4 or Stihl 2 stroke mix. Who knows, but I’m sticking with the Aspen 4 for the foreseeable future, and going to test some other 2 stroke pre mixes out in the strimmer and saw (MS171).

 

Edit:- Both strimmer and mower used pump fuel all their live (in their respective requirements). Both items are 2nd hand, repaired by myself for personal use.