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  #1  
Old 11-01-2022, 08:39 PM
LanceH LanceH is offline
 
Join Date: Sep 2022
Location: Las Vegas, NV
Posts: 4
Default New RV-12 owner: fuel plan question

This question may seem obvious but I'm a bit paranoid . My son and I are taking delivery of our RV-12 tomorrow (first airplane too). Based on what I've read from Vans and this website, I want to use 91 UL, which my airport doesn't sell, so here is my plan for fueling and just wanted to run it by you guys:
  • Buy three 5-gallon plastic fuel tanks for my Mazda3 hatchback trunk.
  • Fill them with 91 octane at the local Costco (it has ethanol. The only non-ethanol gas around is one station that is not 91)
  • Use this pump to get the fuel from tanks to the RV-12 tank: pump
  • Pump the gas through this water/dirt filter: Filter

Is this a reasonable plan? Is using the filter in this way a good idea or is there something better (wondering if it will keep up with the pump)? Thank you.
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  #2  
Old 11-01-2022, 09:27 PM
Dvalcik's Avatar
Dvalcik Dvalcik is offline
 
Join Date: Jul 2011
Location: Royersford, PA
Posts: 917
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Quote:
Originally Posted by LanceH View Post
This question may seem obvious but I'm a bit paranoid . My son and I are taking delivery of our RV-12 tomorrow (first airplane too). Based on what I've read from Vans and this website, I want to use 91 UL, which my airport doesn't sell, so here is my plan for fueling and just wanted to run it by you guys:
  • Buy three 5-gallon plastic fuel tanks for my Mazda3 hatchback trunk.
  • Fill them with 91 octane at the local Costco (it has ethanol. The only non-ethanol gas around is one station that is not 91)
  • Use this pump to get the fuel from tanks to the RV-12 tank: pump
  • Pump the gas through this water/dirt filter: Filter

Is this a reasonable plan? Is using the filter in this way a good idea or is there something better (wondering if it will keep up with the pump)? Thank you.
Look into flo-fast containers https://flofast.com/
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Royersford, PA
david@rv12pilot.com
2022 VAF Supporter


RV12 #568 EAB
* Started 9/30/2011
* 1st flight 8/30/12


http://www.rv12pilot.com
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  #3  
Old 11-01-2022, 09:30 PM
DHeal DHeal is offline
 
Join Date: Sep 2006
Location: Windsor, California
Posts: 1,020
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Check your PMs.
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  #4  
Old 11-01-2022, 09:51 PM
Bob Y Bob Y is offline
 
Join Date: Jul 2017
Location: Piedmont, SC
Posts: 427
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September 15th through June 1st we’re getting winter-blend gas, which has a higher Reid Vapor pressure (RVP) than summer blend, meaning it vaporizes more easily. Higher RVP, lower octane and increased altitude are ingredients for vapor lock or fuel pump inlet cavitation. It happened to me during Phase 1 testing using 91 ethanol free in February. Since then, I use 93 octane, even though it’s got ethanol, which the 912 can easily use. Or, use a 50/50 AVGAS/MOGAS mix. Once you experience a low fuel pressure incident in flight, it’s not something you’d like to repeat. Others may have different opinions, but that’s my experience.
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  #5  
Old 11-01-2022, 10:45 PM
RFSchaller RFSchaller is offline
 
Join Date: Oct 2010
Location: Phoenix, AZ
Posts: 3,333
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Sounds like what I do.
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  #6  
Old 11-01-2022, 11:30 PM
mdoyle mdoyle is offline
 
Join Date: Jun 2005
Location: Xenia, OH
Posts: 168
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I also use 3, 5 gallon containers and purchase 93 octane fuel from Costco. I transfer the fuel to a 15 gallon Flofast container and pump. I add 1 ounce of Sta-bil 360 Ethanol treatment and fuel stabilizer to each 5 gallon container of fuel. No problems for 300 hours, but I am very careful to keep all of the containers sealed and free of contamination.
The Flofast container is marked in 1 gallon increments and makes it easy to keep track of how much fuel you are adding.
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Last edited by mdoyle : 11-01-2022 at 11:33 PM. Reason: Additional information
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  #7  
Old 11-01-2022, 11:42 PM
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Piper J3 Piper J3 is offline
 
Join Date: Nov 2014
Location: Hinckley, Ohio
Posts: 2,820
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Use high quality fuel containers and 15-gal FLO-FAST container and hand-pump. I have been using Costco 93E10 for a least 500 hrs. Costco is top tier fuel supplier.

Bob Y is 100% correct on Vapor Lock potential. It happened to me. See my posts in this thread…. https://vansairforce.net/community/s...ght=vapor+lock
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Jim Stricker - EAA #499867
PPL/ASEL 1970 - Sport Pilot since 2007
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Bought Flying RV-12 #120058 Oct 2015 with 48TT - Hobbs now 830

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  #8  
Old 11-01-2022, 11:48 PM
LanceH LanceH is offline
 
Join Date: Sep 2022
Location: Las Vegas, NV
Posts: 4
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Good ideas - thanks guys.
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  #9  
Old 11-02-2022, 12:08 AM
NinerBikes NinerBikes is offline
 
Join Date: Dec 2018
Location: Granada Hills
Posts: 1,302
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Las Vegas doesn't really get winterized cold temperature fuel, with REID type pressure problems, due to being situated in the desert.

I wouldn't use Mogas above 6 or 7000 ft, but if you're flying 3 or 4000 ft AGL in the winter, it shouldn't be a problem.

A blend of 20 to 40% 100LL if you were running winter grade gas in late spring would be recommended, but if you buy Mogas from a high turnover fuel station like Costco, and buy right before you fill up and go through 4-5 gallons or so a week in regular turnover, you shouldn't have problems.

Keep in mind, Rotax rates this engine in south america up to 15% ethanol unleaded, and currently allows 91 octane unleaded, with or without ethanol. Van's also maintains another electric pump in addition to the Rotax mechanical pump maintaining fuel pressure also and prevent vapor lock.

Worst case scenario is running January bought winter grade Mogas in late spring on a hot day. Keep your fuel turnover rate high, and you shouldn't have any problems.

I ended up measuring my ethanol content on my Costco premium fuel purchases, with fuel samples with every 20 gallon purchase, and at least in my area, I never had over 3% ethanol in any batch I ever purchased, with many measuring no ethanol. YMMV, the pumps usually say " Up to 10% ethanol", so keep that in mind.

Fuel refineries are constantly changing their fuels formulation by the month, based on seasonal highs and lows, per month.

I'm based in Los Angeles and run Costco Premium all the time, from 6 gallon jugs from years ago from my jet ski days back in the 1980's for my RV-12. Never a problem, but I've never spent a lot of time waiting to take off on a really hot summer day, either. 85F outside is mighty uncomfortable inside, cooking inside that canopy if the sun is shining. That canopy will bake you, so getting your flying in early in the day becomes a big consideration in a RV-12
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Last edited by NinerBikes : 11-02-2022 at 12:20 AM.
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  #10  
Old 11-02-2022, 12:33 AM
seagull seagull is offline
 
Join Date: Dec 2019
Location: Highland, CA
Posts: 537
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I fly out of Redlands Ca, hot in the summer. I use Costco 91 octane and check every jug for alcohol content. Typically it is 7 - 8% year round. On long flights I hit 10,000 - 11,000’ and have never had a vapor lock issue.

To fuel I made this cart which pumps at 8 gal / minute.
https://waltsrv12.com/fun-stuff/electric-fuel-cart/
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