Gas question
Le Mans Master
Joined: Dec 1999
Posts: 6,516
Likes: 4,840
From: One Hour From Boston!
1. Probably no 'Seat Of The Pants' difference between 91 and 93
2. Probably no long term consequences of using 91 or 93 octane fuel
3. Probably the savings of using 91 octane won't amount to a hill of beans
So probably, none of it matters. Just do what makes you feel better. (For the record, I use 93).
And I should probably limit my use of the word "probably".
2. Probably no long term consequences of using 91 or 93 octane fuel
3. Probably the savings of using 91 octane won't amount to a hill of beans
So probably, none of it matters. Just do what makes you feel better. (For the record, I use 93).
And I should probably limit my use of the word "probably".
Race Director
Joined: Sep 2000
Posts: 11,139
Likes: 1,910
From: Missouri City, TX
Given a choice, I would generally pick the higher octane. However, if your car is a garage queen, ethanol does absorb water over time and I would thus think the non-ethanol blend would keep longer without the addition of a fuel stabilizer.
Team Owner
Joined: Nov 2007
Posts: 45,262
Likes: 8,533
From: Rochester, NY
1. Probably no 'Seat Of The Pants' difference between 91 and 93
2. Probably no long term consequences of using 91 or 93 octane fuel
3. Probably the savings of using 91 octane won't amount to a hill of beans
So probably, none of it matters. Just do what makes you feel better. (For the record, I use 93).
And I should probably limit my use of the word "probably".
2. Probably no long term consequences of using 91 or 93 octane fuel
3. Probably the savings of using 91 octane won't amount to a hill of beans
So probably, none of it matters. Just do what makes you feel better. (For the record, I use 93).
And I should probably limit my use of the word "probably".
Racer
Joined: Jul 2014
Posts: 271
Likes: 23
From: omaha ne
Today's engines are designed to operate with ethanol based fuels.
By design, I mean all seals, gaskets, hoses or other rubber or plastics that the fuel comes in contact with are ethanol compatible.
Older engines may not be so lucky.
Ethanol will cause non-compatible rubber and plastics to swell, craze or crack. So it is important when replacing these components to make sure they are compatible with ethanol.
Ethanol burns cleaner and is more EPA friendly. Ethanol replaced MTBE which was a carcinagen.
By design, I mean all seals, gaskets, hoses or other rubber or plastics that the fuel comes in contact with are ethanol compatible.
Older engines may not be so lucky.
Ethanol will cause non-compatible rubber and plastics to swell, craze or crack. So it is important when replacing these components to make sure they are compatible with ethanol.
Ethanol burns cleaner and is more EPA friendly. Ethanol replaced MTBE which was a carcinagen.
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Le Mans Master
Joined: Jun 2002
Posts: 6,425
Likes: 3,609
From: Commerce Texas
Today's engines are designed to operate with ethanol based fuels.
By design, I mean all seals, gaskets, hoses or other rubber or plastics that the fuel comes in contact with are ethanol compatible.
Older engines may not be so lucky.
Ethanol will cause non-compatible rubber and plastics to swell, craze or crack. So it is important when replacing these components to make sure they are compatible with ethanol.
Ethanol burns cleaner and is more EPA friendly. Ethanol replaced MTBE which was a carcinagen.
By design, I mean all seals, gaskets, hoses or other rubber or plastics that the fuel comes in contact with are ethanol compatible.
Older engines may not be so lucky.
Ethanol will cause non-compatible rubber and plastics to swell, craze or crack. So it is important when replacing these components to make sure they are compatible with ethanol.
Ethanol burns cleaner and is more EPA friendly. Ethanol replaced MTBE which was a carcinagen.
Instructor
Joined: Aug 2013
Posts: 246
Likes: 7
From: Cedar Falls Iowa
Today's engines are designed to operate with ethanol based fuels.
By design, I mean all seals, gaskets, hoses or other rubber or plastics that the fuel comes in contact with are ethanol compatible.
Older engines may not be so lucky.
Ethanol will cause non-compatible rubber and plastics to swell, craze or crack. So it is important when replacing these components to make sure they are compatible with ethanol.
Ethanol burns cleaner and is more EPA friendly. Ethanol replaced MTBE which was a carcinagen.
By design, I mean all seals, gaskets, hoses or other rubber or plastics that the fuel comes in contact with are ethanol compatible.
Older engines may not be so lucky.
Ethanol will cause non-compatible rubber and plastics to swell, craze or crack. So it is important when replacing these components to make sure they are compatible with ethanol.
Ethanol burns cleaner and is more EPA friendly. Ethanol replaced MTBE which was a carcinagen.
Thread Starter
Drifting
Joined: Sep 2003
Posts: 1,559
Likes: 25
From: Syracuse NY
Drifting
Joined: Jun 2013
Posts: 1,472
Likes: 33
From: Billings Montana
Today's engines are designed to operate with ethanol based fuels.
By design, I mean all seals, gaskets, hoses or other rubber or plastics that the fuel comes in contact with are ethanol compatible.
Older engines may not be so lucky.
Ethanol will cause non-compatible rubber and plastics to swell, craze or crack. So it is important when replacing these components to make sure they are compatible with ethanol.
Ethanol burns cleaner and is more EPA friendly. Ethanol replaced MTBE which was a carcinagen.
By design, I mean all seals, gaskets, hoses or other rubber or plastics that the fuel comes in contact with are ethanol compatible.
Older engines may not be so lucky.
Ethanol will cause non-compatible rubber and plastics to swell, craze or crack. So it is important when replacing these components to make sure they are compatible with ethanol.
Ethanol burns cleaner and is more EPA friendly. Ethanol replaced MTBE which was a carcinagen.
Race Director
Joined: Sep 2013
Posts: 11,825
Likes: 2,474
From: Ft Lauderdale
Tech Contributor
I can get non-eth too but it's more expensive than 93 ethanol. So 93 eth it is. In a closed system like in a car, eth is fine to burn unless you are looking for 1/10's of diff in seconds at the drags.
DD here, don't care that much to use Eth....
DD here, don't care that much to use Eth....