is it really necessary to filter auto gas?

H. Paul Shuch is a Light Sport Repairman with Maintenance ratings for airplanes, gliders, weight shift control, and powered parachutes, as well as an independent Rotax Maintenance Technician at the Heavy Maintenance level. He holds a PhD in Air Transportation Engineering from the University of California, and serves as Director of Maintenance for AvSport of Lock Haven.

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John L
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Joined: Sun Apr 29, 2018 6:39 pm

is it really necessary to filter auto gas?

Postby John L » Sat Feb 23, 2019 11:08 am

Would like to start using autogas in my CTLSi. Mechanic at my field says it's no problem, even with ethanol, as long as the gas doesn't sit in the tanks too long. He suggested I filter it with chamois cloth. I tried this but it didn't work--gas flows through the chamois at such a trickle that it would have taken me an hour or more just to fill a 5-gallon jerry can.

My questions:

Do I really need to filter auto gas?

If so, is there a better way to do it?


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Re: is it really necessary to filter auto gas?

Postby FastEddieB » Sat Feb 23, 2019 12:13 pm

Probably not 100% necesssary, but a good idea nonetheless.

My Sky Arrow came with a “Mr. Filter”, which I always use with auto fuel.
Fast Eddie B.
Sky Arrow 600 E-LSA • N467SA

Sling 2 Pilot
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Re: is it really necessary to filter auto gas?

Postby Sling 2 Pilot » Sat Feb 23, 2019 12:42 pm

I second a Mr Filter. I too received one with my Sling.

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