Question regarding 87 octane for ITS

[RMA]

I always run 93 in all my past and current daily driving sports cars, but being I am in Florida we had the 2 recent storms blow right thru the state along w attributing gas shortages. I have 6 5 gallon gas cans on hand in my garage (all empty) excluding now. 4 are filled w 87 and one left of 93. I only filled the other 4 being the frenzy for gas. I was informed by a Acura tech I am friends with that he does NOT advise running 87 and could lead to detonation and damage ... I was going to give the 87 cans to a friend, but waht should I do in case of an emergency for next time ? A great car buddy of mine you all might know him Joe Raiti thinks to keep a bottle of Octane Boost handy, have any of you folks run into a gas issue similar to this ?

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[Justpassedu]

93 is recommended to run the car to its full protentional but 87 can be run also as it states it in the manual. I wouldn't start doing wide open throttle runs with it but Acura wouldn't list it if it wasn't safe. The Ecu will pull timing to compensate. When I bought my type s the dealer filled my first tank with 87 , I want going open throttle anyway until I broke it in but I did notice better mpg's after I filled with 93 .

 

[boosted_canoe]

you can run 87. it won't run great but just take it easy and should be fine in a pinch. keep the rpms up so you don't lug it and have a light foot.

also, Redline SI-1 (fuel injector cleaner) raises octane a bit and cleans the fuel system at the same time. i love the stuff. you can also run octane boosters.

 

[bullitt]

you can run 87. it won't run great but just take it easy and should be fine in a pinch. keep the rpms up so you don't lug it and have a light foot.

also, Redline SI-1 (fuel injector cleaner) raises octane a bit and cleans the fuel system at the same time. i love the stuff. you can also run octane boosters.

Boosters can also leave tell tail signs on plugs and if there is an issue dealers can potentially void for it.

 

[RMA]

 

[RMA]

It does list 87 - 93 octane on the gas cap lid shown above. I realize to avoid 87 if all possible. I was just thinking of having a soare bottle or two of an additive laying around my place in case of a future jam during storm season.

 

[reinstated]

Yeah, 93 is best but 87 works in emergencies. Just drive gently.

 

[bvanlieu]

You can run it as stated, use a light foot to not get too heavy into boost, do not lug the car etc....in a pinch.

Do not bother with octane boosters, do the math on what it does and you see its not a point but 10ths of a point, instead get a gallon of good stuff.

A gallon of Toluene from the hardware store is what you want to raise octane in case of emergency in a pinch. Don't use it commonly. Xylene can also be used, T bit better.

 

[NoelPR]

Just use 87 in emergency situations only.
Stay way from additives.

You will be fine.

 

[Fred 930]

For what it's worth, my gas cans for the power tools are always filled with 91 Octane and Stabil. In my area, most fuel contains that rotten 10% ethanol, unsuitable for any length of storage. But there are stations in an adjoining county offering "No Ethanol Premium", which is 91 versus 93 octane. So it's suitable for both the power tools and premium fuel vehicles, plus can be stored for a longer period of time.

 

[Victorofhavoc]

For what it's worth, my gas cans for the power tools are always filled with 91 Octane and Stabil. In my area, most fuel contains that rotten 10% ethanol, unsuitable for any length of storage. But there are stations in an adjoining county offering "No Ethanol Premium", which is 91 versus 93 octane. So it's suitable for both the power tools and premium fuel vehicles, plus can be stored for a longer period of time.

It can be stored for longer and doesn't gum up small engines, but cars are a different story. At least modern DI cars are a different story.

Any vehicle made after the mid 2000s is designed to run on a ratio of ethanol. Turbo cars especially like knock resistance more than burn quantity, so they seem more stable on ethanol fuels. It's not uncommon to see people blending in more e for an e30 mix on stock tunes, in some cars making more power with less heat and cleaner burn. I've also seen tuners advertise that if running a 93/4 ethanol free blend to instead run 91 maps (screenshot attached).

Personally, in my sti in the past I saw a loss of roughly 5-6% on the dyno when initially running 93 eth free, then refueling with 93 +10% (and driving 50mi to get the ecu to readjust) brought power back to normal.

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