What is the recommended gas grade?

Asked by Apr 02, 2008 at 05:30 PM about the 2003 Ford Mustang GT Premium Convertible

Question type: General

10 Answers

89 oct or 92 oct.

3 of 3 people found this helpful.
7,195

my sister in-laws recommends regular. what does the owners manual say?

9 of 9 people found this helpful.
45

i run 101 in my car but it is to expensive the only reason i run it is i work at sunocco and its cheap for me to get it it runs cleaner and the motor dont gum up as bad

1 of 1 people found this helpful.
45

2003 GT...actualy these days even bronze is prety good but depands on many factors my friend. Is it an every day car,do you have a heavy foot? Mid grade should be good enough but if you want a cleaner burn and performance of course the high grade is better. Now days it`s all about price. But higher grade burns better,cleaner and performs better for all cars. Unless your engin is not stock then ya might be better off with the high grade of course.

3 of 3 people found this helpful.
95

I have a 07 Mustang GT, yes i know its a different motor/carm, but i run 93 octane from BP or Texaco. On a dyno when i had like Circle K gas in it, i got 293 horses to the wheels and 310 torque and then they told me to take it to bp across the street and fill it with bp then i got 296 horses and 316 torque. But it matters to you if your going to be on that pedal with a heavy foot or if your just going to drive it normal. I would recommend Premium(93 octane) or at least mid-grade (91 octane)

2 of 2 people found this helpful.
1,115

push the regular button fill her up... unless you superchip her set it up for performance endurance and then save money buying premium... i dont wanna hear haters ive done the math...

3 of 3 people found this helpful.
255

If you're going for max horsepower and performance, 93 Octane is what I use and it noticeably increased performance. If you would like to test it, burn up all the current fuel and fill it up with 93oct. It will work best if the car have significant upgrades.

1,115

You should be ok with regular but the biggest thing is to stay away from ethanol enriched gasoline. I dont care if its cheaper or not. The stuff saps mileage and gums up injectors. If the premium was verified to have no ethanol in it, I would buy that for sure.

455

unless u have a supercharger or turbos just run regular the high octain wont make the car perform any better.....they are designed to run their best on the lower stuff i have a 94 5.0 and i have only put the 83 or w/e it is in it and it runs just fine

2 of 2 people found this helpful.
35

Depends on how you have your engine tuned. If you are running a high performance timing or have a high flow air intake and plenum, I would definitely use 92 octane or higher. For a stock engine use 87 or 89 octane and change the oil every 3000 miles like the owners manual says.

Your Answer

Mustang

Looking for a Used Mustang in your area?

CarGurus has 36,396 nationwide Mustang listings starting at $1,200.

ZIP:

Ford Mustang Experts

  • #1
    Tom Demyan
    Reputation
    4,640
  • #2
    Bob Beaman
    Reputation
    1,270
  • #3
    COMETGUY61
    Reputation
    1,110
View All

Related Models For Sale

Used Chevrolet Camaro
450 Great Deals out of 30,881 listings starting at $2,495
Used Chevrolet Corvette
179 Great Deals out of 19,858 listings starting at $2,490
Used Ford Mustang SVT Cobra
8 Great Deals out of 302 listings starting at $5,799
Used Ford F-150
2,603 Great Deals out of 198,109 listings starting at $1,300
Used BMW 3 Series
1,079 Great Deals out of 33,743 listings starting at $1,000
Used BMW M3
33 Great Deals out of 2,027 listings starting at $6,995
Used Jeep Wrangler
346 Great Deals out of 17,446 listings starting at $2,995
Used Chevrolet Silverado 1500
2,283 Great Deals out of 169,793 listings starting at $1,000
Used Nissan 350Z
56 Great Deals out of 1,220 listings starting at $3,000

Used Cars For Sale

2017 Ford Mustang GT Premium Convertible For Sale
5 Great Deals out of 992 listings starting at $28,491
2016 Ford Mustang GT Premium Convertible For Sale
3 Great Deals out of 209 listings starting at $26,580
2015 Ford Mustang GT Premium Convertible For Sale
122 listings starting at $21,895

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.