High Test Fuel
RE: High Test Fuel
ORIGINAL: mudpuddle
ironhead, Got an airfield nearby??
In the 1960s when I was on a 64 XLCH we would tank up at the airport, on aviation fuel.
Ran reeeal good.
mudHead
ORIGINAL: 74_ironhead
87 mostly, hard to find 91-93 in small town gas stations but I get it when I can
87 mostly, hard to find 91-93 in small town gas stations but I get it when I can
In the 1960s when I was on a 64 XLCH we would tank up at the airport, on aviation fuel.
Ran reeeal good.
mudHead
Club Member
Joined: May 2006
Posts: 14,564
Likes: 9,223
From: the 50s & the 60s
RE: High Test Fuel
ORIGINAL: 74_ironhead
Even better, my dad owns a fuel business. just got to wait until he gets another load of that aviation fuel, on rare occasion he hauls a few hundred gallons of jet fuel
ORIGINAL: mudpuddle
ironhead, Got an airfield nearby??
In the 1960s when I was on a 64 XLCH we would tank up at the airport, on aviation fuel.
Ran reeeal good.
mudHead
ORIGINAL: 74_ironhead
87 mostly, hard to find 91-93 in small town gas stations but I get it when I can
87 mostly, hard to find 91-93 in small town gas stations but I get it when I can
In the 1960s when I was on a 64 XLCH we would tank up at the airport, on aviation fuel.
Ran reeeal good.
mudHead
Talk this over with your dad. He may know what I am speaking of,
mudGAs
Tourer
Joined: Jul 2006
Posts: 366
Likes: 0
From: Middleburg Florida
RE: High Test Fuel
I am not an authority on Harley's by any means but I have worked on and around engines since my boy hood. My father was a mechanic. I do know this though. A engine will run lower cylinder head temps with higher octane fuel no matter what the ratio is. That is why 87 octane fuel is recommended for most new cars so the heads will not carbon up and make more pollutants. Hotter cylinder head temps keep the carbon burned off. Harley's will run on lower octane gas but will also run a little hotter. Being air cooled already that is not a good thing. I think that is why they recomend 91 or higher. I have a friend that as put over 50,000 miles on his EG classic using mid grade here in Florida with no problems. He does it because he is cheap. I just spent almost $20,000 on my 07 Firefighter Ultra. I think untill I know more than the folks at Harley Davidson. I will do what they say for an extra 20 cents a gal. JMHO
http://bobbyhill.home.att.net
http://bobbyhill.home.att.net
Road Captain
Joined: Dec 2005
Posts: 591
Likes: 1
From: Land O'Lakes, FL
RE: High Test Fuel
Higher compression ratios will make detonation more likely, but there are other factors as well. One of the biggest is temperature. With an air cooled engine that likes to run hot, I don't think it is worth the risk. I recently did the math and at the mileage I am getting, 5000 miles for the year would only save me $35 for the whole year if the difference is 30 cents per gallon.
And as for the reports of the gas stations selling the same stuff, I think only the very stupid station owner would try that. These guys have to get their pumps' accuracy checked every so often and a whole lot of other crap is monitored about the volumes they sell, etc. I seriously doubt this is done. There are also a lot of high compression, high output engines that could probably be destroyed in short order if the octane wasn't as advertised. Most turbocharged and supercharged engines won't tolerate the lower octanes if they are run hard. That's a LOT of liability. Maybe there are cases where availability is a problem and they have the good stuff dumped in all tanks? If that's the case, no way am I going to risk my motor on 87 octane assuming it will actually be higher than that.
Anyway, I think it's worth $35/5000 miles to have one less thing to worry about. I've seen pistons damaged by detonation, it doesn't take long to destroy them.
Kevin
And as for the reports of the gas stations selling the same stuff, I think only the very stupid station owner would try that. These guys have to get their pumps' accuracy checked every so often and a whole lot of other crap is monitored about the volumes they sell, etc. I seriously doubt this is done. There are also a lot of high compression, high output engines that could probably be destroyed in short order if the octane wasn't as advertised. Most turbocharged and supercharged engines won't tolerate the lower octanes if they are run hard. That's a LOT of liability. Maybe there are cases where availability is a problem and they have the good stuff dumped in all tanks? If that's the case, no way am I going to risk my motor on 87 octane assuming it will actually be higher than that.
Anyway, I think it's worth $35/5000 miles to have one less thing to worry about. I've seen pistons damaged by detonation, it doesn't take long to destroy them.
Kevin
RE: High Test Fuel
ORIGINAL: mudpuddle
OK head. I was not speaking of jet fuel.
Talk this over with your dad. He may know what I am speaking of,
mudGAs
OK head. I was not speaking of jet fuel.
Talk this over with your dad. He may know what I am speaking of,
mudGAs
Road Master
Joined: Jun 2006
Posts: 949
Likes: 1
From: Way Down Texas Way
RE: High Test Fuel
Geeeeeeeeezussss!!!!!!
What kpreese said..........If you fill up 4 gallons and the price of high is even .25 higher than regular it's only a dollar more........you spend more than that for a Coke while you're filling up.............
Back in the day you would ride by the station and yell at the gas attendant......."Hey! you still pumpin' Ethyl?"
What kpreese said..........If you fill up 4 gallons and the price of high is even .25 higher than regular it's only a dollar more........you spend more than that for a Coke while you're filling up.............
Back in the day you would ride by the station and yell at the gas attendant......."Hey! you still pumpin' Ethyl?"
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Tourer
Joined: Jan 2006
Posts: 340
Likes: 0
From:
RE: High Test Fuel
octane is the measurment of the temp and press. the fuel detonates and its directly porp. the higher the temp the lower the press. this will happen (visversa.) ther is no or very littel diff in heat energy between grades. new hds are low comp. engens. but when its 100+ degs in tex. i my self run 91 or93 but when it cools off ill be back to the cheep stuff. the shop that just opend that i get my serv. done at got ther daytona twin scan tool. i was the first one in there when they got it, we hooked up the recoder to it and i took out and ran the crap out of it. it was about 90degs. out and showed no det. what so ever
Novice
Joined: Jun 2006
Posts: 24
Likes: 0
From: Alamogordo NM
RE: High Test Fuel
My bike likes the 91 but have you noticed that most stations only have 1 hose for both fuels? When you only put in 3.5 gallons in a tank, how much was left in the hose from the guy in front of you that used the cheap stuff?