Mogas

Norman CYYJ · #1 10-25-2010, 01:16 PM

How many of you are using straight mogas in your RV and what size engine do you have? And what troubles if any are you having? What octane are you using?

rblackley · #2 10-25-2010, 02:05 PM

I ordered an ECI OX-340S. One of the reasons that I chose this engine is that it comes with 8.3-1 compression ratio. The guys at ECI said that Mogas work just fine in this engine.

Ryan

a8301 · #3 10-25-2010, 02:52 PM

I burn 90 octane non-ethanol in a IO 320 Lyc. with on problems. Did check with Bart at Aerosport first.

Bruce 9A

caryr · #4 10-25-2010, 03:11 PM

it burns fine in a O-360 w/ low comp pistons.

The etoh messes up the capacitance fuel guages. They will read double.

I always used the 93 octane mogas.

But I have switched to av fuel now.

Greg Arehart · #5 10-25-2010, 03:45 PM

Superior IO-360 and I burn 91/93 octane (depends on how one rates it, but basically premium autogas) without ethanol. Compression 8.5:1. Works just perfect so far - 300 hours. I do put avgas in when traveling.

greg

kenora · #6 10-25-2010, 06:02 PM

I have heard that you have to adjust the timing (from 25 btdc) when using auto fuel, is this true?
I have a Thorp T-18 with an O-320 E2D 160 hp and would love to use mogas but have been afraid to take the plunge. It is great to see this topic !

SHIPCHIEF · #7 10-25-2010, 08:23 PM

Some States (in the USA) that have laws requiring ethanol in the gas also allow ethanol free gas at wholesale 'fuel farms'. A little extra shopping around, like a visit to the local 'Card Lock' or "Commercial Fuel Network" member distributor could work for you like it did for us. Our CFN FleetWide card is good at over 28,000 fueling sites.
Try: www.cfnnet.com go to the site locator and see if one is near you. Give them a call and ask about the gas.
I carry a 55 gallon drum and a fillrite pump in my truck. The local fuel farm is only a mile farther on the way to the airport, and the price is a little higher than ethanol blend fuel, but the car goes farther down the road per gallon about proportional to the price. The airplane (Cessna 182) loves the stuff.
I know it's not an RV as specified in the first post, but I also know many of you are worried about ethanol blended gas, and this is a way I found to get ethanol free unleaded regular and unleaded premuim mogas in Western Washington.

guccidude1 · #8 10-25-2010, 10:20 PM

I have an O-360, 8.5:1 pistons, that uses 91 octane mogas locally and 100LL when on the road. I have no concerns about the ethanol blended fuel. 3 1/2 years and 625 hours with no detectable problems. Dan

apkp777 · #9 10-26-2010, 05:25 AM

I just started running Mogas 91. It's widely available at surrounding airports with no alcohol. I wanted to wait until I passed 100 hours on the engine before I switched. One thing however, I did have to change my timing on my p-mags.

MOGAS
P-Mags NO Jumper installed
max climb CHT 440+
max cruise CHT 415

AVGAS
P-Mags NO Jumper installed
max climb CHT 415
max cruise CHT 400

MOGAS
P-Mags Jumper installed
max climb CHT 410
max cruise CHT 380

AVGAS
P-Mags Jumper installed
max climb CHT 400
max cruise CHT 370

DISCLAIMER:The above numbers are approximate and no scientific calibrated test equipment was used to gather the numbers, neither was there a professional test pilot and team of engineers. It was just me and my Dynon Skyview

170 driver · #10 10-26-2010, 05:29 AM

I have an RV 9 O-320 150 HP,,the engine doesn't mind autofuel at all, however, I used the rubber gaskets on the fuel senders and the autofuel made them swell and leak, I sealed them with the proseal tank sealer when I installed them but it didn't stop the autofuel from attacking them. I wish I had only used the fuel tank sealant as gasket material but I had that part done before I read all the post that said to discard that gasket and proseal the senders on the tank. This is the only problem I have had with autofuel.
Running avgas now until I can get rid of the sender gaskets that came with the kit.