1966 Best fuel type

[noahmhoskins]

Hey guys! I am a new Thunderbird owner! The previous owner was running E87 with no ethanol in it, but most people online seem to be recommending E91 and they don't say anything about buying no ethanol or not buying it. Should I be running E87 (no ethanol), E91 (with ethanol), or E91 (no ethanol)? Thanks everybody!

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[sre]

Well I think if 10 people respond you will get 10 different answers. I live in Pa. so I can buy real gas. I have 2 old cars "57 T-bird and a '68 Mustang. I run NO-ethanol in those cars. I buy 90 octane regular gas and mix it with 2 gallons of of 104. Gets me close to what gas used to be. In fall I add a can of stabilizer. In 3 years I totally lost a new gas tank, sending unit and Edelbrock carbeurator.

 

[noahmhoskins]

Well I think if 10 people respond you will get 10 different answers. I live in Pa. so I can buy real gas. I have 2 old cars "57 T-bird and a '68 Mustang. I run NO-ethanol in those cars. I buy 90 octane regular gas and mix it with 2 gallons of of 104. Gets me close to what gas used to be. In fall I add a can of stabilizer. In 3 years I totally lost a new gas tank, sending unit and Edelbrock carbeurator.

Awesome, Thanks man! I live in Kansas City (on the Kansas side). Sounds like no ethanol is the way to go though, and like I want high octane. Thanks!

 

[doug7740]

Here is where you can check to see where you can buy 100% gasoline in your area.

Pure-gas.org - ethanol-free gasoline in the U.S. and Canada

Pure-gas.org is the definitive web site listing stations that sell pure gasoline in the U.S. and Canada.

www.pure-gas.org

doug7740
1955 Thunderbird Blue

 

[daytonthunderbird]

I use regular unleaded 87 octane gas wherever it is cheapest. I don't worry if it is ethanol-free, and have never had any problems in over 30+ years I've owned my 67 hardtop.

 

[ricksta56]

I also own a 66, I have the original owners manual, it recommends 99 octane. back than I believe 99 octane was leaded.
I live in Massachusetts and am currently experimenting with gas also.

 

[ricksta56]

I use regular unleaded 87 octane gas wherever it is cheapest. I don't worry if it is ethanol-free, and have never had any problems in over 30+ years I've owned my 67 hardtop.

I'm real surprised and want to read more about how your car runs.

 

[sre]

I think it really has to do with where you live, how often you drive your car. I live in Pa. I don't drive my car from when they start salting the roads until after the 1st heavy rain in spring. I have 91 and 105 racing fuel close to me. I buy some of both and mix it. Yes it is expensive but a lot cheaper then a complete new fuel system or even ruining an engine.

 

[daytonthunderbird]

My 66 has always run flawlessly with the 87 octane gas I purchase, many times at my local Sam's club gas station!

 

[ricksta56]

My 66 has always run flawlessly with the 87 octane gas I purchase, many times at my local Sam's club gas station!

Can you post a video of your motor running on 87

 

[Hernando Muñoz]

Hey guys! I am a new Thunderbird owner! The previous owner was running E87 with no ethanol in it, but most people online seem to be recommending E91 and they don't say anything about buying no ethanol or not buying it. Should I be running E87 (no ethanol), E91 (with ethanol), or E91 (no ethanol)? Thanks everybody!

Avoid ethanol at all times. If your fuel system has not been upgraded with ethanol resistant components, it will "melt"...
Also, more octane run better and you can calibrate timing easier.

 

[DiIanni]

I totally agree. I have a 55 and a 56 Thunderbird, a 54 Austin Healey, a 55 MG TF and a 75 MGB. Fortunately, there is a convenient store chain in upstate New York which also offers high test gas without ethanol. I make it a point to only use their high test gas in all my cars. My only regret is that I can't find a lower octane non ethanol gas which certainly could be used in my smaller cars and at quite a cost saving.