91 vs 93 octane...difference?
This is a discussion on 91 vs 93 octane...difference? within the Internal Engine forums, part of the LSx Technical Help Section category; Originally Posted by Johns00Z28 What about octane boosters...or are they just a gimmic? adds .1-.2 octane so you get 91.2 ...
06-03-2009, 03:36 AM #41
06-03-2009, 05:47 AM #42
06-03-2009, 07:30 AM #43
Would be cheaper to mix 50/50 and still get more octane than dumping 10 cans of boost in there. Thats what my father did until we finally built him a pump gas motor.
06-04-2009, 12:26 AM #44
- Join Date
- Oct 2007
- Beaver Dam KY
79 T/A -91 Firebird
- 1998 Trans Am -Oynx Black
octane boosters will FRY your plugs....
06-04-2009, 08:12 AM #45
Eh,,,I tried them in the past, late 80's early 90's. Never had any problems with plugs at all. The boosters just never did much of anything to be honest. I felt it was waisting money that could have been spent on better gas.
06-06-2009, 11:46 AM #46
- Join Date
- Jun 2009
- Spartanburg, South Carolina
- 1999 Camaro z28
I live in SC and some places around here sell gas called white gas, it doesnt contain the 10%Ethanol that probably 99% of gas stations now sell. I actually talked to my neighbor about this he has a 70 Chevelle SS and was about to run braided lines inside his car. He said on a chevelle forum board ppl are complaining about the Ethanol eating the insides of the braided lines so be aware of that if anyone here is looking to replace some old Fuel lines. But anyways i run pure 93 w.o the 10%Ethanol in it and I don't remember any knocking or going on with mine. Not even any lag around the 2-3k rpm line like the thread started with. There's 1 local place that sells I think like 112 octane out of a pump but that stuff is like $15 a gallon and you cant even pump into your car cuz its race fuel its illegal. They make you buy only like 2 gallons at a time and put it in a jug lol. I'm thinking of experimenting.
06-06-2009, 03:33 PM #47
Ethanol will deteriorate any rubber substance, whether it be fuel lines, accelerator pumps, needle and seats, fuel pump diaphrams etc...not just braided lines.
The higher the concentration the worse it is. Which is why alot of people are not sold on the 85% ethanol gas made from corn. It also doesn't like cold weather.
Any type of alcohol/ethanol mix is highly corosive.
06-07-2009, 05:54 AM #48
06-07-2009, 08:41 AM #49
06-07-2009, 04:06 PM #50
- Join Date
- Mar 2008
- UNC Charlotte
- 2000 Chevrolet Camaro Z28
06-07-2009, 05:04 PM #51
Your government just mandated that ALL GAS STATIONS are now required to mix at least a 10% mixture of f*#+ing ethanol to all blends. And did you know that crap causes all kinds of problems in vehicle's not equiped for flex-fuel like a 10-20% drop in mileage not to mention advertised 93 octane is now no longer 93 octane but something less, like 89. Also your car now runs warmer and the ac doesn't cool as it did before .
06-07-2009, 05:58 PM #52
06-08-2009, 05:23 AM #53
06-08-2009, 08:04 AM #54
06-21-2009, 07:16 AM #55
06-21-2009, 07:29 AM #56
the days of buying good pure gasoline are coming to an end......looks like firing up a still and making your own will be the only way soon
06-21-2009, 09:21 AM #57
Ya I just read an article in Hot Rod that said Ethanol is not mandated as of yet. So there are stations around with pure gas. I have found a couple up here in Prescott.
What they go on to say is.....there is a catch. Not all states are required to advertise that ethanol is being mixed with the gas.
So there can be ethanol mixed but it's not advertised on the pumps. They recommended visiting a website that had a list of all states that are required to advertise ethanol mixture. So you at least know if you are living in a state that does in fact have to advertise it. They didn't give a particular site, I had to google it. I'll see if I can find it again.
06-21-2009, 10:01 AM #58
There is a list at the bottom of states mandated with 10% ethanol as of 2008. As you can see it's not many.
If you do a search for ethanol free gas in your particular state you can find stations that are 100% gasoline. That's what I did.
You generally find them away from the big cities.
There are a few states that have ethanol only in the lower grade fuels,,,but 91 octane and higher are free of ethanol. That would be great if every state followed that rule. That way the tree huggers can have there gas and us high performance drivers can have ours.
06-21-2009, 03:51 PM #59
06-21-2009, 05:27 PM #60
That was just one website. There are literally dozens with good info. If you are looking for something specific all you have to do is google it. Just takes a little time reading, but alot of good info, right down to any gas stations left in your area selling 100% gas.
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