'67 Fuel Type?
07-28-2006, 05:53 PM
#1
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Join Date: Jul 2006
Posts: 23
'67 Fuel Type?
I just recently picked up a 1967 coupe as a project car. It is in running order and is drivable, but it is now out of gas. I have no idea as to what kind of fuel to use. Were the original mustangs still using leaded fuel? Or is it cool to use unleaded fuel. Also what octane is best for a 200ci 6 cylinder?
Thanks for your help.
Thanks for your help.
07-28-2006, 07:22 PM
#3
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Join Date: Jul 2006
Posts: 23
RE: '67 Fuel Type?
its not the 289. there were some other motor options besides the 289 as a straight 6. the smallest was a 170 that was only made for the 1964 models, and there were a couple others up to the 289. I believe they stopped making the 200's when they got past 1967 and used the 289's as the baseline motor. I could be wrong though.
but thanks for your input i dont want to fry the heads.
but thanks for your input i dont want to fry the heads.
07-28-2006, 08:54 PM
#4
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RE: '67 Fuel Type?
Back then lead was in the gas and it probably used 87 octane.The unleaded gas was good for the valves on cars built back then.I think unleaded came around 1974(forgive me a may be off by a few years).If that car has not had an engine replacement or had it rebuilt in 39 years why worry about it now.Likely someone has probably rebuilt it,changed the valves and so you are fine with 87 unleaded.
08-31-2006, 07:51 AM
#5
Join Date: Aug 2006
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RE: '67 Fuel Type?
its not the valves you have to worry about, its the valve seats.as long as your not hard on the motor i would just run regular 87.i run 7000 rpm on 93 octane(only because of compression) with stock 1970 cast iron seats on a 306.as long as there is no valve bounce you should be fine.easy to toulip valves if you overrev on those seats though.
09-02-2006, 02:21 AM
#6
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Join Date: Apr 2006
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Posts: 128
RE: '67 Fuel Type?
You can purchase a lead substitute at any auto parts store or Wal Mart. Just add to the tank at fill up. It keeps the valves/seats from burning. I use 87 oct in my '67 289.
Good luck,
Troy
Good luck,
Troy
09-02-2006, 10:37 AM
#7
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RE: '67 Fuel Type?
I drove a 70 Old's Cutlass on 92 unleaded for years.Fairly hard too!The valve seats were OK when I had to get the valves replaced due to a timing gear explosion.
You should be fine but If you're still concerned the hardened valve seats aren't that expensive to install (I don't think?)
You should be fine but If you're still concerned the hardened valve seats aren't that expensive to install (I don't think?)
09-02-2006, 03:31 PM
#8
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RE: '67 Fuel Type?
289 is a V8, not a 6. The 250 was the biggest 6 put in the cars, 71-73 mainly. The 300 six was put in light duty pickups and the like.
ORIGINAL: Foxrider64
its not the 289. there were some other motor options besides the 289 as a straight 6. the smallest was a 170 that was only made for the 1964 models, and there were a couple others up to the 289. I believe they stopped making the 200's when they got past 1967 and used the 289's as the baseline motor. I could be wrong though.
but thanks for your input i dont want to fry the heads.
its not the 289. there were some other motor options besides the 289 as a straight 6. the smallest was a 170 that was only made for the 1964 models, and there were a couple others up to the 289. I believe they stopped making the 200's when they got past 1967 and used the 289's as the baseline motor. I could be wrong though.
but thanks for your input i dont want to fry the heads.
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