What's up guys is it safe to run 100 octane on a 06 tl and does it make any difference in performance

 

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).

 

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.

 

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.

 

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.

 

Can I fill up the tank with 100 unleaded or do I have to mix it with premium fuel

 

where the hell are you guys getting 100 octane fuel...

 

I can get 109 for about $6.00/gal. Fill your tank up with that on a reg basis and find another job. 93 is also around 3.15/gal where I live.

Good luck OP!

 

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!

 

yeah thats all I use too.

 

We don't have 91 in my area; just 93 for our premium grades. Neither one of my 3G TL's (a manual and an automatic) have ever pinged under any load or ambient temperature conditions/combinations. I've never run anything other than 93 in either of them.

 

Used that since day one or sometimes I would switch to Texaco or Chevron all these at 93

 

I forgot where but some place was advertising 97 octane for 3.50 a gallon in Houston a few weeks ago. With gas getting high in Texas, the .50 might be worth it

 

You're lucky. Even the 91 they sell here behaves like 89.

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.

 

All I run is 93. It's Shell V-Power 93 99.999999% of the time. I'm a believer...

If you guys had the choice between 91 and 93 what would you run?

 

93 all the way. With the way mine pings on 91, 93 should result in slightly more power and mpg.

 

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.

 

91 Octane OR HIGHER...pg 164, owner's manual:

"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?

 

^gives us worse gas mileage

 

Which one?

I started a thread a couple years ago proving how higher octane than 91 will increase mileage. I have logs with a few thousand miles worth of driving on the exact same trip each time.

 

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.

 

I think he means ethanol blended gas can decrease mileage. I just think gasoline without ethanol treats the car better in general.

 

wow.. gas prices are cheaper around you guys. its 3.53 here in brooklyn.. I even saw 3.57 at a BP on 8th ave & 65th st..

 

wow! I pay 2.75 for premium fuel in tucson.

 

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 see. You're right, it definately decreases milage.

 

im saying how ethanol in gasoline, gives a car worse mileage compared to running 100 percent gasoline

i agree 91 octane does give better gas mileage then 87

 

It definately does. I wish we could get fuel without it. You should be able to see a 5% increase in mileage without it.

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 ran a full tank of 100 oct for shits and giggles and it was fine but noticed a 0 difference except my exhaust gas had a sweet smell, which i kinda liked

 

i wonder why it smelled sweet?

 

Bet it smelled like almond extract.

 

Probably because the ECU didn't adjust timing right away. Next time pull the battery like IHC mentioned. Worth a shot.

 

i run 93 in both my cars and would run higher if it was readily avaiable at gas stations where i live..only place i can get it at is a local racetrack

 

I've heard that the 10% ethanol provides benefits like keeping the engine clean. Is that bogus or is there any truth to that?

 

There's some truth to that but at 10% I can't see it doing much. I've seen some E85 high mileage engines and there's a definite difference. Only problem is it's burned nearly twice the fuel over it's lifetime so there can be issues with that.

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.

 

Sweet??? You weren't running leaded fuel, were you?

 

Alright. I have a 76 gas station 6 minutes from my home.

Question: If I mix some 100 octane in with my 91 octane, do I have to, or should I reset the ECU?

My initial assumption: No.

*Keep in mind, I have a manual transmission.

 

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.

 

Since I have a 6MT, I was thinking it wouldn't benefit me to reset the ECU.

If I do, should I use the fuse method, or disconnect the negative battery cable?

 

noooo, i think 100oct unleaded smells sweet lol

i definitely know not to run leaded.