What is the cost of the auto gas STC for a 235? What modifications
are required? I own a share of a 235 and here at SLC 100LL is pushing
$5 and gas is only $2.80.
Thanks,
Joe Benson N9381W
This post is TOTALLY untrue, and ranks as one of the most uninformed posts I've ever seen on this group.
1. There is no requirement to use anything higher than 87 octane regular unleaded gas with our Cherokee 235 STC.
2. The low compression O-540 was designed to run on 80 octane avgas -- a fuel that is no longer available. By using 100LL in your plane, you are using a gas that it was never designed to use.
3. 100LL has 4 times more lead in it than 80 octane gas. This is why you must lean your engine severely in order to NOT foul spark plugs when you run with 100LL avgas.
I'm just astounded when I read misinformation like this. Given all the problems caused by 100LL, how did it EVER develop that some pilots today still believe that 100LL is somehow "better" for your plane than car gas? Nothing (and I mean NOTHING) could be further from the truth.
What's even funnier is the statement that it's somehow "better quality" gas. The local HyVee gas station where I fill my transfer tank pumps more gas PER DAY than my airport pumps all YEAR. Let's talk about what happens to aviation gasoline that sits in a big metal tank for 11 months, shall we?
Then let's go down the road to discuss FAA approval of mogas in airplanes. This is the same organization that we all bitch about for being so anal that they won't let us use a non-approved light bulb in our plane -- yet, for some reason, people think that they were wild-eyed lunatics when they approved the use of car gas in aircraft? Does anyone REALLY believe that the FAA didn't check mogas thoroughly (beyond thoroughly!) prior to approval?
If you want to spend an extra $15 per hour on a fuel that can actually harm your engine (100LL), have at it. But don't spread misinformation like this to other 235 drivers, please. --
Jay Honeck
Iowa City, IA
Pathfinder N56993
www.AlexisParkInn.com
"Your Aviation Destination"
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Subject: [PA28235] Re: mogas From: PilotKris@xxxxxxx Date: Tue, 11 Jul 2006 14:16:19 +0000 To: pa28235@xxxxxxxxxxxxx
To: pa28235@xxxxxxxxxxxxx
OK OK,
Enough is enough on the MoGas deal.
Everyone seams to be forgetting that you MUST follow all of the STC requirements which include using SUPER unleaded gas. That is not that much cheeper than AvGas, around here it's only about $.50 per gallon. You also MUST test the MoGas for alcohol. Who is actually doing that? For EVERY purchase?
I know a guy who's so proud of the $ he saves buying MoGas, I then found out he buys it at the cheapest "brand-X" station around. I'd doubt that he's even getting 91 octane.
What about the stability of MoGas (especially for those storring large quanities). I've had many tanks of MoGas "go-bad" in cars, boats, motorcycles but never a load of AvGas.
There are MANY differences between 100LL and MoGas that go beyond just the octane. Oh, and let's not forget that the differences vary BY DESIGN for the seasons.
The biggest reason AvGas costs more than MoGas is quality control. There MUST be a totally dedicated supply chain that extends from the refinery all the way to your airplane. The fuel CANNOT be pumped via a pipeline or even carried in a truck that has ever had MoGas before. Can your local Brand-X station say the same about their "super" unleaded?
Oh, and do I even start about varpor-lock problems?
I'll gladly pay the extra $7.00 an hour for the extra security provided by AvGas...
(Besides, MoGas STINKS!)
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