Regular gas OK for turbo?

[maladora_ai]

so supreme gas only for turbo,got it. so in theory would adding a bottle of actane boost help in burning efficiency and make the car run better overall?

that is, in stock form without any real upgrades

 

[tkelly27]

You aren't in boost 90% of the time you drive the car. It's a low compression engine at that point. I run 87 in mine all the time, no knock, until I turn the boost up. If I turn the boost up, I run premium, or better. I drive like a grandma most of the time, and even when I am doing "spirited driving" it is normally around 10-12psi. With some timing pulled (thanks to DSMap), and my FMIC, I don't ever knock. Amazing. So what if I'm not getting the most performance out if it, it gets out of its own way, and there is always the option of turning up the boost and running premium.

 

[dsmfa9nutter]

Jesus christ, this post is from 4 years ago. Big thumbs down to the idiot that brought it back from the dead. Another thumbs down to the people who replied to the op.



@ I recieved an infraction for this post. ^^^ I didn't even notice it until now, long after it expired.

 

[JusMX141]

Jesus christ, this post is from 4 years ago. Big thumbs down to the idiot that brought it back from the dead. Another thumbs down to the people who replied to the op.

No need to get your bowels in an uproar.

All of the information in this thread is still valid; it's not like our cars no longer require premium fuel to operate. I could see if we were discussing a tuning platform that is no longer available or something else that changes over the years, but fuel requirements don't change.

The point is to spread as much valid information as possible to prevent the chance that in another 4 years a member is searching for the same information and decides that 98RedDragon really knew what he was talking about.

 

[98gsxtuner]

Sorry if I'm asking a stupid question but I was watching a show on e85 yesterday. Now I normally fill up with 91 as thats the highest I have near me (32 miles away). They said on the TV show that we will have a e100 octane rating in the near future, they said that it will burn much hotter than regular unleaded. So I guess the question is can we run this in our cars or will we have to make the necessary upgrades like we do to run e85???

And what is the difference between say e100 and a regular 100 octane rating,besides the ethenal???

 

[jrohner]

That is not the octane rating, it's how much ethanol is in it -- E85 is about 85%; E100 is close to 100% but can't be pure 100% ethanol because then you'd have to pay liquor tax on it since it wouldn't be toxic to drink. E85 is around 108 octane, but is many times a little lower since it's not always 85%; sometimes it's actually more than 85% though -- they aren't always that precise on mixing it. The octane rating on alcohol fuels doesn't really mean quite the same thing as gas, since it's a totally different type of fuel. It acts like it has a higher octane than it's rated at -- there's a lot more fuel going into the engine and there is a very good cooling effect too.

 

[JusMX141]

They said on the TV show that we will have a e100 octane rating in the near future, they said that it will burn much hotter than regular unleaded. So I guess the question is can we run this in our cars or will we have to make the necessary upgrades like we do to run e85???

I'm not sure what they're telling you....Ethanol and higher octane fuels both burn cooler than regular gasoline, so less heat is expelled during the combustion cycle allowing you to run a leaner mixture without seeing knock.

And what is the difference between say e100 and a regular 100 octane rating,besides the ethenal???

Because I'm too lazy to type, you do the reading:

E85 - Wikipedia, the free encyclopedia

 

[viprez586]

This is the epic fail of kids going to the race track in their mustangs and camaros...they run high 14s-15s. With disappointment they start eye-balling the race gas. They get their buddies to scrounge up some money, dump a few gallons in their tank and run the same times as before.

 

[98gsxtuner]

This is the epic fail of kids going to the race track in their mustangs and camaros...they run high 14s-15s. With disappointment they start eye-balling the race gas. They get their buddies to scrounge up some money, dump a few gallons in their tank and run the same times as before.

First off I was just asking about e85 because im not familiar with it. Any one that thinks a higher octane gas is gunna make there car faster needs to do alot of learning.

 

[viprez586]

Seemed like a hostile reply there.
Trust me I didn't mean anything by it, just thought I'd share a few giggles. All the correct information about E85, octane ratings, etc. Has been clearly identified by wisemen in this thread.

 

[Mrdrd_Laser]

The only way you should run 87 octane is if you have no plans of ever going wot. I have to run 93 in mine seeing as it is still has n/t pistons, those babies dont like knock haha. But even with turbo pistons I would still run the highest octane availible which for most is 91.

 

[joescool2008]

Just run over 90 octane in it and call it a day, most super unleaded gas has additives and you actually get better fuel economy than running the regular 87 anyways.

 

[1990AWD]

okay, so higher octane is better, but not necessary? do I have that right? I always have run regular (87) in my stock TSi (motor is '93) and have had no problems. (I get my fuel dirt cheap on my farm hehe)

 

[2slow4utsi]

That's rubbish.

The lower octane fuel might cause some engine knocking and a stock ECU will retard the timing to avoid the knocking and not activate the BSC keeping the boost lower. The ECU retains this long term correction in the "octane" variable and uses it to interpolate between the normal and "octane" timing maps.

On a car with the BCS swapped for a MBC the only thing the ECU can do is retard the timing and if your running higher than stock boost levels that may not be enough to save your engine. Once you start modifying your car you should always run premium.

Steve

Sounds like he knows what he's talking about. +1

 

[steve]

okay, so higher octane is better, but not necessary?

If you not going to run high octane fuel you might as well get a civic.