is 100 octane fuel safe
12-08-2010, 08:56 PM
#2
06 Anthracite TL
Safe...probably. Necessary...absolutely not! If the timing/ compression ratio is not designed for high octane, it yields no benefit- the TL is designed for 91 octane- use that or whatever is closest (same or slightly above is OK- in NJ we rarely have 91, so I typically wind up using 93).
12-08-2010, 09:21 PM
#3
Team Owner
100 unleaded is very safe, safer than 91.
100 leaded will ruin the cats and 02s in less than 1 tank of fuel.
The TL pings on 91 when stock. During the summer I usually use a weak mix of 100 or 109 unleaded to bring octane up a little to get rid of the knock. This is a high compression 11:1 engine.
If yours pings as most of them do, you will pick up a little hp and mostly torque. It's not much of a difference but it's worth a few hp and more importantly the power delivery is so much smoother because the ECU is not constantly retarding timing.
If you switch, disconnect the battery for a while so the ECU can reset. If you don't disconnect the battery it will eventually put full timing in but it won't be right away. You could easily burn through the first tank of race fuel before you see the full advantage if you don't reset first.
With it being winter you may not see a difference since it's less likely to ping. I suggest the VP 109 because it has a slightly quicker burn rate than 91 so it should be worth something.
100 leaded will ruin the cats and 02s in less than 1 tank of fuel.
The TL pings on 91 when stock. During the summer I usually use a weak mix of 100 or 109 unleaded to bring octane up a little to get rid of the knock. This is a high compression 11:1 engine.
If yours pings as most of them do, you will pick up a little hp and mostly torque. It's not much of a difference but it's worth a few hp and more importantly the power delivery is so much smoother because the ECU is not constantly retarding timing.
If you switch, disconnect the battery for a while so the ECU can reset. If you don't disconnect the battery it will eventually put full timing in but it won't be right away. You could easily burn through the first tank of race fuel before you see the full advantage if you don't reset first.
With it being winter you may not see a difference since it's less likely to ping. I suggest the VP 109 because it has a slightly quicker burn rate than 91 so it should be worth something.
12-08-2010, 09:26 PM
#4
Your Friendly Canadian
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Sure it's safe, but it's effing expensive. The only reason you'd really use it is if your car's got some problems with heat, but being December, it's not really useful at all.
My
. The car was built to run on 91. Nothing wrong with that.
My
. The car was built to run on 91. Nothing wrong with that.
12-08-2010, 09:40 PM
#5
Team Owner
It will run ok on 91 but several of us have monitored knock and a bone stock TL pings during normal driving and pings like crazy in the higher gears at full throttle. It doesn't matter what Acura says, if the car pings on 91, it will run better on 100. Let's not forget that knock is very hard on the engine so 100 is better for the engine.
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12-09-2010, 07:37 AM
#9
BANNED
iTrader: (33)
meh, ever since i got my TL-S i've used shell vpower 93, everytime. it's around $3.09 a gallon. thursdays are .5 off! 
12-09-2010, 07:51 AM
#11
Registered Member
It will run ok on 91 but several of us have monitored knock and a bone stock TL pings during normal driving and pings like crazy in the higher gears at full throttle. It doesn't matter what Acura says, if the car pings on 91, it will run better on 100. Let's not forget that knock is very hard on the engine so 100 is better for the engine.
12-09-2010, 08:15 AM
#12
12-09-2010, 08:20 AM
#14
Team Owner
93 may be enough but when I started mixing fuels, it took approximately 96 octane before it would stop knocking. Every car is different though. Manuals have more timing but they also have slightly less load on the engine for a given gear so who knows.
This was verified with a scanner monitoring knock. I can rarely hear it ping but the scanner showed a different story. Inaccurate also showed a ton of knock retard especially in the higher gears. You're probably not going to hear this due to all of the other noises at speed.
12-09-2010, 09:09 AM
#16
Team Owner
12-10-2010, 08:18 AM
#17
That's what I figured. Someone said the TL was built to run on 91 octane, so I thought I'd throw it out there. I don't mind paying for the 93... with the better mileage and they way it's nicer to the car it's definitely worth it to me.
Now if I could only find gas that doesn't contain ethanol....... bleh.
Now if I could only find gas that doesn't contain ethanol....... bleh.
12-10-2010, 08:38 AM
#18
Race Director
"Your Acura is designed to operate on
unleaded gasoline with a pump
octane number of 91 or higher.
Use of a lower octane gasoline can
cause occasional metallic knocking
noises in the engine and will result in
decreased engine performance."
What's your issue with ethanol blends?
Last edited by nfnsquared; 12-10-2010 at 08:45 AM.
12-10-2010, 09:08 AM
#20
Team Owner
12-10-2010, 09:43 AM
#21
I also have used 100 octane gas many times. We have sunoco 100 octane here and its about 6.00 bucks a gallon. I mix it with 91 to average out the octane due to how expensive the 100 octane is. It does make a slight difference in performance IMO.
12-10-2010, 11:58 AM
#25
BANNED
iTrader: (33)
all this talk about 100 octane fuel is making me thirsty.
i wonder where i can find some of this where i live, i've never seen it posted anywhere.
i wonder where i can find some of this where i live, i've never seen it posted anywhere.
12-10-2010, 01:17 PM
#26
Team Owner
12-10-2010, 01:28 PM
#27
i agree 91 octane does give better gas mileage then 87
12-10-2010, 01:31 PM
#28
Team Owner
Just look at e-85 cars. They're running 15% gasoline and the injectors have to be nearly double the size for the same hp level. The car uses 60-80% more fuel on E-85.
i wonder why it smelled sweet?
12-11-2010, 07:35 AM
#31
Registered Member
12-11-2010, 11:32 AM
#35
Team Owner
I won't get into politics on here but I believe politics is the number 1 reason we have 10% ethanol in fuel and it has nothing to do with emissions, cleanliness, etc.
12-11-2010, 11:33 AM
#36
Team Owner
12-11-2010, 01:15 PM
#38
Team Owner
So you don't have to but you should.
12-11-2010, 03:52 PM
#39
You never have to reset the ECU but if it's been pulling timing on 91 the whole time, it can take a couple days to put the full timing back in once you're on the high octane. So not resetting it wont hurt anything but you won't see the advantages for a couple days and you're basically wasting the high test fuel. Also, with this super slow change it will make it hard to notice any difference.
So you don't have to but you should.
So you don't have to but you should.
If I do, should I use the fuse method, or disconnect the negative battery cable?
lol