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Old 11-27-2014, 02:05 PM   #1
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Fuel Question

Just out of curiosity, for those of us with gas engines, is there a preference on using the lower octane fuels to save some cash at the pump or do you splurge on the higher octane when towing your trailer? And how about types of gas, how many people are sold on a certain brand of gas.

Personally, I use regular in my tuck when not towing and the higher octane when my trailer is hooked up. I also prefer Chevron w/ Techron. I have, what might possibly be a false sense of security that their gas is better for my truck, but also their gas stations tend to be cleaner and bigger.

I've heard the higher octane burns faster causing less gas mileage and I've also heard it's better combustion for the engine. Additionally, I've heard both side of the fence for if the Techron in Chevron gas actually helps or if it's just a marketing ploy.

Other opinions on this are interesting to me.
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Old 11-27-2014, 02:59 PM   #2
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Originally Posted by Evo2700 View Post
Just out of curiosity, for those of us with gas engines, is there a preference on using the lower octane fuels to save some cash at the pump or do you splurge on the higher octane when towing your trailer? And how about types of gas, how many people are sold on a certain brand of gas.

Personally, I use regular in my tuck when not towing and the higher octane when my trailer is hooked up. I also prefer Chevron w/ Techron. I have, what might possibly be a false sense of security that their gas is better for my truck, but also their gas stations tend to be cleaner and bigger.

I've heard the higher octane burns faster causing less gas mileage and I've also heard it's better combustion for the engine. Additionally, I've heard both side of the fence for if the Techron in Chevron gas actually helps or if it's just a marketing ploy.

Other opinions on this are interesting to me.
Personally I have always used what my cars manufactures have recommended - that being the 87 octane juice.

In the "older days" with the higher compression engines in the muscle cars,the higher octane fuel might have been necessary,but in today's computer burdened engines I just stick with the 87 octane.

I remember from the past when the major brands of gasoline all had their own special additives such as Mobil with their detergent additive that cleaned your engine - their ads showed the front of a washing machine.

I'm not a fuel engineer,but I'm not sure today that each major brand gasoline provider doesn't get their fuel from the same spigot.
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Old 11-27-2014, 03:03 PM   #3
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Higher octane burns slower not faster and is made for higher compression ratio motors. If your motor is designed to run on 87 octane and your using the higher octane in it your wasting your cash.
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Old 11-27-2014, 03:18 PM   #4
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Originally Posted by Evo2700 View Post
Just out of curiosity, for those of us with gas engines, is there a preference on using the lower octane fuels to save some cash at the pump or do you splurge on the higher octane when towing your trailer? And how about types of gas, how many people are sold on a certain brand of gas.

Personally, I use regular in my tuck when not towing and the higher octane when my trailer is hooked up. I also prefer Chevron w/ Techron. I have, what might possibly be a false sense of security that their gas is better for my truck, but also their gas stations tend to be cleaner and bigger.

I've heard the higher octane burns faster causing less gas mileage and I've also heard it's better combustion for the engine. Additionally, I've heard both side of the fence for if the Techron in Chevron gas actually helps or if it's just a marketing ploy.

Other opinions on this are interesting to me.
You have heard wrong. Google is your friend! If you do just a little bit of research you will find that octane is NOT a performamce booster.
It SLOWS combustion down so that engines with higher compression wil not pre-detonate (like a diesel). Using it on an engine that does not need it is not only a waste of money but you are causing long term damage to your catalyst system due to excessive unburnt fuel being dumped in your catalytic converter.

There are many people who have many anecdotes on more power, better mileage etc etc by simply using a higher octane fuel in a vehicle that is built to run on 87 and when I hear them I always just nod my head and smile, and anybody who knows what octane ACTUALLY does will do the same.

Now, there are vehicles with high performance/high compression engines that can benefit from higher octane but, they can also run 87 if that is all that is available and the computer will adjust accordingly.
But again, the performance does not come from high octane.
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Old 11-27-2014, 03:32 PM   #5
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When you google it you will see that some articles say it makes a difference and some say no difference. That's why I figured I would see what the consensus on here is.
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Old 11-27-2014, 03:41 PM   #6
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In the Ram with the 5.7 it says to use 89 for the best performance. With mine I tried using 89 and 87 while towing and I did not notice a difference, but my trailer is so light I don't need to use a lot of throttle to get going. My VW says to use 91 min so I always use the high octane in it.
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Old 11-27-2014, 05:43 PM   #7
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If you are not experiencing spark knock (pinging or pre-detonation) when the engine is pulling hard then there is no benefit to using higher octane fuel than what the manufacturer recommends. The exception might be if you have a pcm tune that changes the ignition timing to increase engine performance.
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Old 11-27-2014, 05:53 PM   #8
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When you google it you will see that some articles say it makes a difference and some say no difference. That's why I figured I would see what the consensus on here is.
Indeed you will find many opinions out there. Again, lots of people have lived their entire lives thinking higher octane = better performance, was a great marketing ploy during 60's and 70's, "ethyl" "hi-test" and the like, all hogwash marketing. Infact it was so ingrained in the American psyche that The Feds finally passed laws requiring oil companies clean up their act and do truth in advertising and to not push the false idea that higher octane was better for your car. They also made it mandatory that any additives added to fuels, eg "Techron", be the same amount in all grades instead of the ploy of having more in premium so people would unnecessarily buy it even tho their car could not use it.

Research what octane actually is, you will get a good understanding and be able to make an informed decision at the pumps instead of a marketing ploy.
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Old 11-27-2014, 06:32 PM   #9
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Indy I would agree with you years ago but in a modern engine the computer can adjust many parameters to reduce the pinging before you are even aware that it is happening. This can reduce the amount of power the engine makes. In a turbo it will reduce the amount of boost.
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Old 11-27-2014, 06:32 PM   #10
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Indeed you will find many opinions out there. Again, lots of people have lived there entire lives thinking higher octane = better performance, was a great marketing ploy during 60's and 70's, "ethyl" "hi-test" and the like, all hogwash marketing. Infact it was so ingrained in the American psyche that The Feds finally passed laws requiring oil companies clean up their act and do truth in advertising and to not push the false idea that higher octane was better for your car. They also made it mandatory that any additives added to fuels, eg "Techron", be the same amount in all grades instead of the ploy of having more in premium so people would unnecessarily buy it even tho their car could not use it.

Research what octane actually is, you will get a good understanding and be able to make an informed decision at the pumps instead of a marketing ploy.
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