Octane
Senior Member
Joined: Sep 2019
Posts: 1,348
Likes: 20
From: North of Atlanta
Cut her a break, Castillo. We all have our opinions, informed or not. But we all can apply a weight to each person's opinions. She gave her opinion based on her experience. As for me, when I want to know something automotive related I hit YouTube, forums, and watch videos only from mechanics and engineers and never rely on only one opinion. I'll watch many videos on one topic and get as close to consensus as I can. That's how I ended up with a Mazda. The close-to-consensus was Mazda was right up there with Honda and Toyota quality without the brand image upcharge. I still believe that is true.
It is always hilarious to read Cali's posts as he makes assumptions and accusations when someone doesn't agree. Now I don't know what I am talking about when I say my cars drive the same with different brands of fuel. Lol...
Senior Member
Joined: Sep 2019
Posts: 1,348
Likes: 20
From: North of Atlanta
Dude there is NO Costco hate only that the fact about their fuel is not accurate. But mentioning that word does tend to rally others around the thought. Lot of that going on these days off forums. 
For someone that keeps up on the service of their vehicles and takes care of them you question some information and use less than the best fuel for them? lol
You wouldn't notice a difference because you don't use or have any monitoring equipment except your "Butt" dyno and what the MPG indictors is. And even that is suspect?
Your vary statement "drives the same with all gas" is evidence that you are not as much a car enthusiast as you have given all of use long time members the impression about yourself on this forum?
I have given the tools to aide in anyone to test their Mazda when using different brand gas and octane values and it's easy enough for anyone to do? well maybe not you from your response?
For someone that keeps up on the service of their vehicles and takes care of them you question some information and use less than the best fuel for them? lol
You wouldn't notice a difference because you don't use or have any monitoring equipment except your "Butt" dyno and what the MPG indictors is. And even that is suspect?
Your vary statement "drives the same with all gas" is evidence that you are not as much a car enthusiast as you have given all of use long time members the impression about yourself on this forum?
I have given the tools to aide in anyone to test their Mazda when using different brand gas and octane values and it's easy enough for anyone to do? well maybe not you from your response?
Banned
Joined: Feb 2026
Posts: 43
Likes: 8
From: North Carolina
In the area where I live, we have ethanol-free gas readily available for all the boats filling up. All the stations have separate supply hoses and nozzles for ethanol-free and ethanol-containing fuels. Now, for the folks who buy 87, 89 and 93 octane fuel with ethanol, the hose is the same for all three grades.
Banned
Joined: Feb 2026
Posts: 43
Likes: 8
From: North Carolina
Not a she BTW. I am a poultry veterinarian....
It is always hilarious to read Cali's posts as he makes assumptions and accusations when someone doesn't agree. Now I don't know what I am talking about when I say my cars drive the same with different brands of fuel. Lol...
It is always hilarious to read Cali's posts as he makes assumptions and accusations when someone doesn't agree. Now I don't know what I am talking about when I say my cars drive the same with different brands of fuel. Lol...
"Can't we all just get along?"
-----Rodney King
Senior Member
Joined: Oct 2018
Posts: 10,515
Likes: 216
From: Northern California
You want evidence then tellus all the thread where you posted the last time you connected to your OBDII diagnostic connector and ran a simple ECU system health check? Or even if you have ever done it. I will ask 2 specific questions if you answer yes you have. 
We can keep this up all day long. You will point out at time you are a DIY and other times you take your Mazda into the shop for very simple DIY service. So which is it?
You responses on this vary forum ,anyone that is a DIY or car enthusiast will disagree with anyone that can tell the difference in engine performance between using low octane (minimum required) and the highest available 90-98 octane . Even owning any platform Turbo the recommended for best overall performance if the highest octane available to the owner. NOW WHY IS THAT? lol
hahahahaha!! Dude you are ridiculously funny at times on the forum/ It keeps a few of us on our toes and defiantly with a smile!
We can keep this up all day long. You will point out at time you are a DIY and other times you take your Mazda into the shop for very simple DIY service. So which is it?
You responses on this vary forum ,anyone that is a DIY or car enthusiast will disagree with anyone that can tell the difference in engine performance between using low octane (minimum required) and the highest available 90-98 octane . Even owning any platform Turbo the recommended for best overall performance if the highest octane available to the owner. NOW WHY IS THAT? lol
hahahahaha!! Dude you are ridiculously funny at times on the forum/ It keeps a few of us on our toes and defiantly with a smile!
Senior Member
Joined: Apr 2021
Posts: 1,841
Likes: 25
From: Maine
I guess when it comes right down to it, we don't know what is in anything we're buying and we're at the mercy of the seller telling us the truth (or not). If these stations filled their 91 octane below-ground tanks with 87 octane how would I know? Answer: I wouldn't. As it is, if you buy a different fuel product than the one the previous customer purchased, you will be getting some quantity (up to a half gallon) of the previous customer's product due to what is in the pump plumbing. The dude in front of you purchased an ethanol product and you follow up with a non-ethanol product it probably will make little difference in a car tank but if you're just buying one gallon for your weed wacker then it will make a difference,
Senior Member
Joined: Apr 2021
Posts: 1,841
Likes: 25
From: Maine
Not a she BTW. I am a poultry veterinarian....
It is always hilarious to read Cali's posts as he makes assumptions and accusations when someone doesn't agree. Now I don't know what I am talking about when I say my cars drive the same with different brands of fuel. Lol...
It is always hilarious to read Cali's posts as he makes assumptions and accusations when someone doesn't agree. Now I don't know what I am talking about when I say my cars drive the same with different brands of fuel. Lol...
Thread Starter
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Junior Member
Joined: Jan 2026
Posts: 14
Likes: 0
I merely stated the actual facts that show other than the required EPA minimum percentages, no one knows exactly what is in any tier gasoline they purchase.
My hydroplane racing boat outboard got great speed from my ether/gas fuel mixture, but it required several rebuilds every season and occasionally caught on fire.
Life is short and getting shorter, chill out and use whatever gas you feel is best for you and/or those that agree with your decision.
My hydroplane racing boat outboard got great speed from my ether/gas fuel mixture, but it required several rebuilds every season and occasionally caught on fire.
Life is short and getting shorter, chill out and use whatever gas you feel is best for you and/or those that agree with your decision.
Last edited by Old Greybeard; Feb 19, 2026 at 09:05 AM.
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