Fighting this along with everyone else, but I am surprised no one has mentioned the Swift Fuel UL94. I am on a campaign to get it at my airport and it would seem to be ideal for many of us. Has anyone else been using it?

If the engine is rated for the fuel, where is the loss of twenty thousand dollars?? You’re not making any sense. Just sayin’.

I’m in Wackifornia. Current price 100LL is $4.05/gallon and 91AKI is $2.89 at the local Quick Stop. Maybe everyone else is rich, but saving a more a couple AMU’s a year in fuel costs and having a cleaner engine that will go longer between oil changes makes a lot sense to me.

Ron, I'm right next door in the Burg. To keep in the spirit of this thread - it's your choice to run AutoFuel. You decide if all the extra handling, formula changes and lack of quality control is worth the risk to your plane, the planes around you and possibly your life.

I have twenty thou$and reasons why I won't. No mater the rating, I've got a box of parts that says it won't hold up.

I thought you were going with the UL?

Yes, Jim, that?s the post I was referring too. I?ve converted all my gas containers to vented ones.

I am doing UL. But much like the Rotax, the UL is rated to run on regular unleaded 91AKI fuel with up to 15% ethanol (I think the Rotax is only for 10%). It’s difficult for me to understand what risks you’re speaking of without more information - probably good for a separate thread.

My brother’s Piper Warrior runs on MOGAS just fine and has done so for many years. At the risk of being very obvious, my car runs fine on MOGAS and it’s the same compression ratio as my aircraft engine. Running MOGAS is just fine, assuming your engine is rated to run on it.

If the engine is rated to run on certain fuel and you’re still getting detonation, there’s likely something else at issue - maybe timing?

Back to the thread, transferring your own fuel is a very cost effective process.

What I do - -
 

I bought a smaller aluminum platform to stand on. I built a funnel that fits tight into filler neck. I can dump 5 - 6 gallons in less than a minute. Makes it much easier. Will try to get new pic site so I can show pics.

Test pic site - -
 

Still testing

I use a Mr Funnel to filter my auto fuel when I'm transferring to a Flo-Fast container then use a Flo-Fast pump to pump (http://www.flofast.com/pumpstore.html) it into my -12. I don't care for the extra transfer that takes but does have the advantage of filtering all fuel that goes into the plane. Using the pump easily transfers the fuel into the plane.

I use a Mr. Funnel too, the 5gpm model. Definitely recommended to get any water or particulate out. BTW, I’ve tested mine with a gallon of fuel containing 1qt of water and it really does a good job of holding water; I was impressed.

MoGas is filtered to 30 microns at the pump provided the distributor maintains their filters. AvGas is filtered at 10 microns - always. Your filter is good for 127 microns per the manufacture.