What type of gas do I use in a 1966 Mustang with 289 4bbl?

Asked by Nov 22, 2013 at 05:14 PM about the 1966 Ford Mustang Base

Question type: Maintenance & Repair

5 Answers

105,305

OOHH those were the days, I'd use the best pump gas you could find and see if it pings on acceleration, if it does then add some Octane 104 to the fuel. Have the heads been updated to run unleaded fuel?

3 of 3 people found this helpful.

That's a fish I caught in a river in Central Calif in case anybody was wondering,,,no idea what is is except the obvious: a fish

3 of 3 people found this helpful.

t'shoes I don't know your age, but dude..those were the days indeed. I for a short time had a '65 Mustang 289 and being young and dumb, actually 17 at the time I sold it for (obscenity omitted) $500 because it was loosing coolant that I later learned what a freeze plug is. A 50ยข freeze plug. It was not the ultimate 1964 -1/2 Mustang but a '65 that hit the Ford Dealer Showroom in October 1964 with a 289 w/4bbl & manual 4 speed..that dang car weighed about 2000lbs and would light up tires literally into flame. Okay...taylor...the best gas you can find. NO OFF BRANDS..91 minimum...and if you have a small airport in your area they will be happy to take $6 a gallon for 101 or maybe even 103 octane. Sometimes they will 'hem and haw' aaack you want what? But just tell them and rest assured they will take your money. The 101octane gasoline has an extremely high flash point. Your 289 probably has an 11:1 compression ratio, the 5.0 for that year does, early version of the best engine Ford ever produced... to this day. It's no fluke these engines have lasted so long in production and performance.

2 of 2 people found this helpful.
116,415

Good evening davidh25. I was wondering but was afraid to ask. Lol

1 of 1 people found this helpful.
72,345

Yup use a name brand premium grade gasoline with a lead substitute. HTH. -Jim

1 of 1 people found this helpful.

Your Answer

Mustang

Looking for a Used Mustang in your area?

CarGurus has 38,591 nationwide Mustang listings starting at $1,895.

ZIP:

Ford Mustang Experts

  • #1
    Tom Demyan
    Reputation
    4,710
  • #2
    Bob Beaman
    Reputation
    1,340
  • #3
    F_O_R
    Reputation
    1,170
View All

Related Models For Sale

Used Chevrolet Camaro
443 Great Deals out of 31,242 listings starting at $1,450
Used Dodge Charger
440 Great Deals out of 32,944 listings starting at $1,999
Used Chevrolet Corvette
160 Great Deals out of 17,404 listings starting at $3,000

Used Cars For Sale

2018 Ford Mustang For Sale
8,609 listings starting at $21,799
2017 Ford Mustang For Sale
82 Great Deals out of 10,513 listings starting at $13,579
2016 Ford Mustang For Sale
95 Great Deals out of 2,875 listings starting at $13,499
2015 Ford Mustang For Sale
50 Great Deals out of 2,752 listings starting at $12,495
2014 Ford Mustang For Sale
109 Great Deals out of 2,665 listings starting at $9,500

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.