Airborne_Again wrote:
Hjelmco 91/96UL
There was an initiative 10-15 years ago to start selling Hjelmco 91/96UL in Norway. Nothing has come out of it AFAIK. Probably due to the relatively “low” prices we have had on 100LL. With the prices we see on 100LL today though, I think any alternative would be welcome. Looking at the specs, Hjelmco 91/96UL seems to be at the top, followed by Warter’s AKI93. UL91 is far behind and will, if not taken into account, eventually cause detonation problems with the 912 S/ULS. Anyone who don’t believe that should read the service letter from Rotax: SL-912-016, Essential information regarding engine behavior, performance and manifold pressure data for ROTAX Engine Types 912 and 914 (Series). Revision 2 as of 04.12.2020.
Bonjour á toutes et tous!
Sujet tres interessant auquel je me permet de participer.
Effectivement l’AKI93 a pour but principal de viser les utilisateurs de moteurs Rotax qui habituellement utilise de l’essence automobile qui qualitativement en aviation n’est pas recommandée pour different raisons. l’AKI93 est certifiée sans plomb et sans éthanol.
Ce qu’il faut se rappeler est que les essences aviations UL91 et 100LL ont des normes spécifiques et sont faites a partir de composant aviation (prix différents de composant auto) et a des méthodes de productions et de transports tres spécifiques. Donc un prix different. Ce qui trouvent l’avgas 100LL trop chère doivent aussi réfléchir au volume utilisé annuellement (en France on va dire approx 22 millions de litres peut être par an alors qu’on consomme en une journee en France … je vous laisser chercher le chiffre hallucinant que cela représente).
au niveau des index octane moteur (MON – celui qui est la base de reference pour les fabricants de moteurs, a ne pas confondre avec le RON)
Avgas 100LL > MON min 100 (voir 101 chez Warter)
UL91 > MON min 91
AKI93 > MON min 88
SP98 > MON plutôt de 87 et non pas de 98 comme bcp le pensent!
Rotax a cette recommandation: min. MON 85 RON95, min AKI 91
l’AKI93 a un index AKI donc de min 93. Cette essence a été testé sur des moteurs Rotax avec des résultats intéressants par exemple au niveau des Températures huile, et EGT largement inférieures avec l’AKI93 qu’avec de la SP98!) et l’AKI93 a une stabilité dans le temps contrairement aux essences automobiles.
Au niveau de son tarif, Warter livre en vrac a partir de 2000 litres pour un tarif lors de la semaine du 11 mars qui était un tarif plus qu’interessant pour une essence faite dans une raffinerie spécialisée en essences aviation, avec transport aussi dêdié comme pour la 100LL ou UL91), et surtout avec des performances bien supérieures a une SP98.
l’aérodrome de Cuers a une station de AKI93 mise en service cette semaine.
Weird, I suddenly can read and understand Polish 
For those who can’t, I took the liberty to have DeepL.com (free version) translate the above post by @Flysafe:
Hello everyone!
This is a very interesting topic which I would like to take part in.
Indeed, AKI93’s main purpose is to target Rotax engine users who usually use automotive gasoline, which is qualitatively not recommended for aviation for various reasons. AKI93 is certified unleaded and ethanol-free.
What you need to remember is that UL91 and 100LL aviation gasolines have specific standards and are made from aviation components (priced differently from automotive components) and have very specific production and transport methods. So a different price. Those who think 100LL avgas is too expensive should also think about the volume used annually (in France we’ll say approx. 22 million liters perhaps per year, whereas in France we consume in one day … I’ll let you work out the mind-boggling figure that represents).
in terms of engine octane index (MON – the reference base for engine manufacturers, not to be confused with RON)
Avgas 100LL > MON min 100 (see 101 at Warter)
UL91 > MON min 91
AKI93 > MON min 88
SP98 > MON rather 87 and not 98 as many think!
Rotax has this recommendation: min. MON 85 RON95, min AKI 91
AKI93 has an AKI index of min 93. This gasoline has been tested on Rotax engines with interesting results (e.g. oil and EGT temperatures much lower with AKI93 than with SP98!), and AKI93 is stable over time, unlike automotive gasolines.
In terms of pricing, Warter delivers in bulk from 2000 liters upwards, with a price during the week of March 11 of 2.08 euros per liter, all taxes included. A more than attractive price for a petrol made in a refinery specialized in aviation gasolines, with transport as dedicated as for 100LL or UL91), and above all with performances far superior to SP98.
Cuers airfield has an AKI93 station which went into service this week.
I don‘t believe that this fuel can be noticeably superior to „SP98“.
For France, here and there, it could be interesting anyway (since almost no airfield carries SP98 so far). In Germany, many GA airfields already have ethanol-free quality SP98 at this cost.
@Flysafe EuroGA is in ENGLISH.
Also you should declare your the name of your company. Well, it is obvious. Otherwise your posting may be deleted. Guidelines.
It would also be useful if you participated in this much more important thread 
Dan wrote:
Weird, I suddenly can read and understand Polish
I have been waiting for this day to come!
boscomantico wrote:
I don‘t believe that this fuel can be noticeably superior to „SP98“.
it isn’t, but it’s “certified”
Peter wrote:
this much more important thread
Not in terms of actual number of users it’s not
Here is Total response : link
The fuel sold now at LFPN and LFPL is a true aviation mogas, ethanol-free like the one from Warter.
Just more expensive but paid by credit card.
Total say in the article they want to sell it @ 20 airfields across France by the end of 2024.
Given the fall of 100LL and the failure of UL91, they go for a Rotax-specific fuel.
Cool, what’s the price compared with 100LL or UL91 ?
From January 24 :
Jujupilote wrote:
FYI, mogas at the new LFPN pumps costs 2.39€/L. Avgas is 2,89€/L. Both are sold by Total.
RON98 on the roadside costs about 1,85€/L.
Car fuel prices have gone up since. I don’t have more recent info.
50cts/L cheaper than 100LL/UL91 is probably their pricing strategy.
