Premium Unleaded

[Toby]

If I put Premium Unleaded in my A20A4 engine will this do any engine damage at all?? I have used it before and it improved milage and power but will anything happen if I use it all the time?? as far as I know it would be just like using normal Unleaded and adding a bottle of octane boost

[Vanilla Sky]

it would only hurt if you used fuel with a loower octane than what's reccomeneded for the engine, which in this case is 85


Derick

[2Fast_Fiero]

My dad used to put 85Octane in my accord when he owned it, but ever since I've owned it, I did a complete engine flush, and I've been using Premium Unleaded 91 Octane, and it definatly improved my MPG and Performance.

[shepherd79]

man where do you find 85 octane gas. here in WV the lowest we have is 87.

[Vanilla Sky]

in some areas... just like premium is 91 in some places, and 93 in others

Derick

[iiviasterp]

id recomend putting premium in your accord. about a year ago my car started to spark nock and that was when i was runnin 87 octane.... i decided to try 93.... no more spark nock and a bump in mpg and alittle better performance, its all ive run since

[Neuspeed87lx]

i always put 94 in my car ....in my accord and now in my civic ....it costs my like a buck more each time i fill it up

[Toby]

So the bigger the octane rating the better??

[My 89 Accord Lxi]

here the highest we have is 97 octane

[original2k]

premium is very nice, i think it's like a drug to my car tho, whenever my tank gets low i don't have to look at the gauge cuz i can feel it when i shift, but when i filler up in premium it feels like a brand new car. gotta love that 93

[carotman]

The recommended octane in my manual is 90....

[Stefi-blueLX]

Yes, keep using premium! I've never used anything else. Honda's, to me, work the best with it. It's been workin great for my LX and my mom's 93 LX wagon! Down here though premium is 91....I think.

[smufguy]

the only reason you put higher octane is when u have a sports engine that needs it. not your car which is not performance oriented. There was a good article abotu why and when u should use hig octane. shit cant remember the site.

[Neuspeed87lx]

they have racing fuel up the street from me ....i think its 100 ,,,i should get it sometime and see what it does

[1988starter]

I use a combo of 93 and 89 my car likes that the best I try to get about 91 but it does not run too good on 94.

[Coitis1]

so can u mix octanes w/ no problems? like if i put in $10 of 95 and then made up the difference with 87 octane if i was low on money. just curious, probably can't afford it anyway. "all my life been po, but it really doesn't matta no mo.."

[tyne89]

itll just give you an average octane between them depending on how much of each you put in. high octane burns hotter which leads to its own problems like decreased o2 sensor life. i live in detroit somewhat near a small private airport. i can either get 110 octane super blue from the gas station or aviation fuel (i dont even know the octane on that stuff but its gotta be like 130)
but both are really expensive so i got with 86-87. after 13 years my car is so torn up i dont think it would ping if i put 80 in it.

[Toby]

Here in Australia the Premium has an octane rating of 98, we don't have fuels with that many different octane ratings.

[87AccordsterLx]

Ok check it out....

The octane rating of gasoline tells you how much the fuel can be compressed before it spontaneously ignites. When gas ignites by compression rather than because of the spark from the spark plug, it causes knocking in the engine. Lower-octane gas (like "regular" 87-octane gasoline) can handle the least amount of compression before igniting.

The compression ratio of your engine determines the octane rating of the gas you must use in the car. One way to increase the horsepower of an engine of a given displacement is to increase its compression ratio. So a "high-performance engine" has a higher compression ratio and requires higher-octane fuel. The advantage of a high compression ratio is that it gives your engine a higher horsepower rating for a given engine weight... The disadvantage is that the gasoline for your engine costs more.
So yes it helps to some level... but for our cars I would think that 89 would be just fine... Now as I understand it... the 93 octane burns at a cooler temperature then the 87 being that when a gas is compressed it gets cooler... now someone please correct me if I'm wrong... heat doesnt have to mean power... we all relate them together becasue when we see afterburners go off dumping jet fuel we think power... but in all reality if we took any flamable substance and ignited it while dumping massive amounts of it into the open... we would get the same effect... like I said... someone please correct me here...

[87AccordsterLx]

anyone on this???

[smufguy]

the fact of spontaneous ignition is true and thats why they (sports engine) use higher octane. but u also gotta know, there was a car made by toyota which went by the name trueno, which is a same engine (AE 86) of the Mr2, but was not a transverse, but an inline 4 (RWD). that engine used unledeaded gasoline of 86 octane (regular) and had a compression of 11:1.

Its how ppl manufacture some engines. My aunt's car, an infinity J30t, has a V6 (210HP) with a compression of just 10.5:1 and it used premium unleded (97 octane). weird huh???

[87AccordsterLx]

yeah... that is interesting

[rallyeNate]

NO, higher Octane will not hurt you car. you will only beable to go up to 104 octane, unless noted (104+ octane requires some lead additive)

thats neat that your octane is 98, what it the method that they rate your octane? the reason you use a higher octane is because, higher octane feul is more stable (less pre-ignition) and the burn rate becomes longer. if you know anything about deisel engine the principle the same. more power out of a longer burn duration.

[Jerren]

wow coitis is using my avatar

[Jerren]

and what do you know, he's in MO as well.