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Hello, I believe the owners manual says 2001 Bullitt is safe to run on 87. Does anyone with an un-tuned car have a history of running 87. How long have you been running on 87 or 91 and have you ever had any issues you believe to be octane related.

Do you ever run 87 or 91
Do you only run 91 if its hot or your at the track/Drag.
Is putting 91 in a stock bullitt not necessary

Obviously if your car is tuned for 91 you should run 91.

Any stories about octane.

I just spoke to a longtime mechanic specializing in ford and mustangs that was really surprised when I asked the question. He felt that you should not run 87 in a mustang. I thought that was a little bit of a strange response. In his defense he works in the performance world so naturally most things he touches would probably be tuned or rated for 91.
 

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If your '01 is made for 87, run 87. Buying higher octane won't hurt your car, but it won't add horsepower or give any greater mileage. In other words, unless you experience detonation (ping) problems, you're wasting $ with higher octane.

Our '08-'09 models (Bullitts only) were given a variable tune, one that actually add power as octane is increased. If I recall correctly, this was the first model Ford used a variable tune on. We were guinea pigs, so to speak.

(edit) I noticed you are in California...perhaps local knowledge is better. Last time I drove down there was in 2001, but the "gas" I bought sure didn't smell like gas. More like distilled cat urine.
 

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Discussion Starter #3
can you guys just post a quick reply with 87 or 91. I just want to get a feel of what octane you all are running. You could add stock or tuned.

I just bought the car and I'm running 91 because I don't know if the car was ever tuned but probably was not because its pretty stock.

example:

stock 91

stock 87

tuned 91


Thanks,
 

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my $0.02...

I have been running 89 (Plus) in the car since I had engine knocks the first month or so. After that I haven't had any issue since and that was 18 years ago. I've only put Shell gas in the car.

89 or 91 would be fine. as far as 91 goes, depends if you want to spend the extra money.
 
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Mine also had some pinging when it was stock, so I ran 91 in it. Now I am tuned and run 93.
 

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the question is really about the tune of 3103. Is it stock or aftermarket? If aftermarket, what octane was it tuned for?

There should be some kind of car guy code of honor that requires the keeping of a file containing all things done to the car. A log book. I do that, but few do...when a car leaves me, the file and log book pages get passed on.

(edit) Doing this and a couple of bucks will buy me a cup of coffee. However, it's not hard to do and gives me a clear conscience when I bid the car goodbye.
 

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Discussion Starter #8
Interesting information about the pinging. thanks for the info guys.

anyone else fell free to drop in your experience's.

thanks much!
 

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Hello, I believe the owners manual says 2001 Bullitt is safe to run on 87. Does anyone with an un-tuned car have a history of running 87. How long have you been running on 87 or 91 and have you ever had any issues you believe to be octane related.

Do you ever run 87 or 91
Do you only run 91 if its hot or your at the track/Drag.
Is putting 91 in a stock bullitt not necessary

Obviously if your car is tuned for 91 you should run 91.

Any stories about octane.

I just spoke to a longtime mechanic specializing in ford and mustangs that was really surprised when I asked the question. He felt that you should not run 87 in a mustang. I thought that was a little bit of a strange response. In his defense he works in the performance world so naturally most things he touches would probably be tuned or rated for 91.
I always ran 93 in mine, nothing else.
 

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87 octane sure doesn't do my 69' any good. It's in getting it's original carburetor rebuilt right now and the mechanic said the older cars were not made for 87 and just don't do well over time. :nerd:
 

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:D Bought my 01 in Dec 09 with 115,000 miles on it. Have no idea what gas was run in it with previous owner as I bought it off a used car lot. Have run 87 in it since I’ve owned it with no problems. 15,000 miles in almost 10 years. Yes it’s a weekend fun car as my daily driver is a 3/4 ton pickup.
 

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87 octane sure doesn't do my 69' any good. It's in getting it's original carburetor rebuilt right now and the mechanic said the older cars were not made for 87 and just don't do well over time. :nerd:
Vicki, it not octane alone...it's gasohol! Nothing in an older car was built for it. Rotted fuel lines made with rubber designed for leaded gas, aluminum carbs corroded beyond repair because alcohol attracting water, and other problems. Only made worse in a car infrequently driven when the gasohol gets older.

Ask your mechanic...In Oregon, 91 octane no alcohol is available, but hard to find. It's what I run in my '09. Luckily for me, a station 12 miles away has it, and they are on my usual route to my favorite pool hall. Cost is around a buck a gallon more, but you will see your mileage jump by about 10%. Might be a place near you that sells it?

(edit) seems there is. Check here: https://www.pure-gas.org/index.jsp
 

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Thanks for the link! There is a dealer 10 minutes away that has 92 octane with no alcohol.
 

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Vicki, it not octane alone...it's gasohol! Nothing in an older car was built for it. Rotted fuel lines made with rubber designed for leaded gas, aluminum carbs corroded beyond repair because alcohol attracting water, and other problems. Only made worse in a car infrequently driven when the gasohol gets older.

Ask your mechanic...In Oregon, 91 octane no alcohol is available, but hard to find. It's what I run in my '09. Luckily for me, a station 12 miles away has it, and they are on my usual route to my favorite pool hall. Cost is around a buck a gallon more, but you will see your mileage jump by about 10%. Might be a place near you that sells it?

(edit) seems there is. Check here: https://www.pure-gas.org/index.jsp
I will check into that next spring when we bring her back out! Thanks Paul! :kiss:
 

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Vicki, especially for your infrequently driven '69 I would suggest 91 (or more) Octane NO ALCOHOL gas. It would also be a good thing to add an additive called Sta-bil to the tank when doing the winter storage thing. Sta-bil does what it says...keeps gas fresh longer.

When gasohol was forced upon us here in Oregon, a 10% blend, it caused some major problems in areas. Small engines, especially chainsaws, were being destroyed. Boaters were finding themselves stranded with engines seized because of the water being picked up by the hydroscopic alcohol. So, the legislature passed a law allowing clear (no alcohol 91 octane) gas to be sold. This was a benefit to those who had older collector cars as well. Older cars have problems with gasohol. Newer cars made with gasohol in mind use different materials designed to withstand the bad effects of alcohol...my '09 and Cindy's '16 Camry have no problem running on it since we drive both often enough to keep fresh gas in the tanks.

If I were going on a long freeway flog, I'd probably run alcohol gas in my '09, probably 87, since my variable tune could adapt. I'm pretty sure my first full tank was 87 octane gasohol, given by the dealership. MPG was horrible on that tank, a run over the coast range and back home...the power and MPG improved as I switched to 91 octane "clear premium" as it's called here.

here's a link to a video on Sta-bil:

 

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Discussion Starter #16
pwd72s, since you brought up he whole gasohol thing I have a few questions. I read a little info on wiki so the more I know the more confused I get. So is gasohol and E10 the same....I think so, correct? I also read that gas with ethanol has a higher octane rating by 2 or 3 octane.... is that acurate. And if so does that mean they sell you 85 octane and call it 87..... Or am I just assuming the worst in big oil companys? If you don't know the answers to these questions I understand, sorry for putting on the spot. Moving forward I will be paying better attention to the gas pumps and what % of ethanol they are running.

I am designating you as the offical gasohol expert. Congrats!!!
 

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Gas pumps in Iowa

And three nozzles, color coded. I do my best to use only 91 octane, the highest octane I can find in Iowa. I have been known to pump one gallon of ethanol-gas blend to get me down the road to a real gas station.
 

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Discussion Starter #18
Thats crazy we don't have all those different options in CA los angeles... normally only 87, 89, 91. thanks for the picture!
 

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pwd72s, since you brought up he whole gasohol thing I have a few questions. I read a little info on wiki so the more I know the more confused I get. So is gasohol and E10 the same....I think so, correct? I also read that gas with ethanol has a higher octane rating by 2 or 3 octane.... is that acurate. And if so does that mean they sell you 85 octane and call it 87..... Or am I just assuming the worst in big oil companys? If you don't know the answers to these questions I understand, sorry for putting on the spot. Moving forward I will be paying better attention to the gas pumps and what % of ethanol they are running.

I am designating you as the offical gasohol expert. Congrats!!!
(edit) Being in L.A., and based on emails with California car guys, I think you're pretty well screwed. E10 in various octanes is all you can buy. At the pumps, that is...and racing fuels are far too spendy for regular street driving, although I know there are some cars (think old Porsches and other exotics) running it.

Yes, E10 means 10% ethanol. Alcohol is a great fuel for power. Dirt track racers run on pure alcohol. But their cars are built for it, meaning a higher fuel to air ratio...HUGE jets on those cabs. Engines have all forged or hyperutectic pistons, higher compression, sodium cooled exhaust valves, and other tricks.

It all boils down to amount of energy in a gallon of fuel. Alcohol contains less btu's (british thermal unit) of energy per gallon than pure gasoline. Thus the MPG drop with gasohol. Octane ratings have nothing to do with alcohol percentage...

I suspect that in Marguerite's pic, that the 91 is "pure" gas...all the others contain alcohol, even the 87, which I suspect is E10. What gave me the clue was those little "clean air" stickers above the nozzles. No such sticker on the 91 octane. The pumps in Iowa...corn farmers there LOVE gasohol. ;)

One way to know for sure would be to test for alcohol with a handy yet inexpensive kit used by pilots to test airplane fuel. You do not want alcohol in any aviation fuel. Remember how I said it picks up water? Water freezes in high altitudes...and the last thing you want in an airplane is a frozen fuel line. Plane may run fine on takeoff, but climb to an altitude that's above the freezing level it's oh sheet time. It's a simple test...bought mine from the experimental aircraft association on a tip from a pilot buddy. Watched him drain some fuel from a wing tank into a little vial, then add some water...asked what he was doing. A week or so later, he sent me a test kit as a gift. A quick internet search should find other test kits out there.
 

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Yes, E10 means 10% ethanol.

I suspect that in Marguerite's pic, that the 91 is "pure" gas...all the others contain alcohol, even the 87, which I suspect is E10. What gave me the clue was those little "clean air" stickers above the nozzles. No such sticker on the 91 octane.
Yep, the 91 is the only pure gas and the 87 is E10. Several brands of gas here are E10 at all octanes and the most popular convenience stores, Casey’s, only carries 87 E10. They do have great doughnuts, though. Around here, 87 octane is always E10 and 89 is usually E10. Corn-for-ethanol country here, ya know!
 
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