[candlewick96]

Seems like this is the second time the set up guys at Chapparal Motors have tod me this. The first time, for my 400 SuMo that the Owner's manua said woud be totally happy with 87 octane, which it is. Any advice?

[Asmith]

The 9:1 compression ratio should be fine with 87 octane. Try it, listen for knock and adjust upward as necessary. We run 92 in our CRF 80 (same basic engine) but only because we use the same gas can for our X's.

[candlewick96]

Now why do you think they recommend this (seems like) to every Tom, Dick, and Harry who they hand over keys to? My take is "use the lowest octane unless you notice pinging."

[Asmith]

Now why do you think they recommend this (seems like) to every Tom, Dick, and Harry who they hand over keys to? My take is "use the lowest octane unless you notice pinging." :evil:

I don't know, but I agree with your take.

The lower octane fuels have a faster flame spread, so they'll result in more complete combustion and maximize power. Maybe that's their theory???

[zak13]

i use 93 in my xr100r and it works fine i would say they say that bec i think the min is 91 and runnin 87 will break it and ull end up takin it to a shop again u know i might be wrong bec i know notin bout octane

[124]

i use 93 in my xr100r and it works fine i would say they say that bec i think the min is 91 and runnin 87 will break it and ull end up takin it to a shop again u know i might be wrong bec i know notin bout octane

87 octane all day with no troubles. You are wasting money putting 93 octane in a stock XR100.

Please work on the type in your posts. You come off sounding very uneducated. Not to mention, it is very unprofessional. There are other sites that don't mind it though, feel free to go there.

[.sinner]

87 octane all day with no troubles. You are wasting money putting 93 octane in a stock XR100.

Please work on the type in your posts. You come off sounding very uneducated. Not to mention, it is very unprofessional. There are other sites that don't mind it though, feel free to go there.

I AGREE

[Billys2006CRF100F]

Please work on the type in your posts. You come off sounding very uneducated. Not to mention, it is very unprofessional. There are other sites that don't mind it though, feel free to go there.

I feel the same way every time I read his posts. Often times, I have to read them more than once just to understand what he's trying to say. I PMed him about it and he told me to "Get used to it"

[zak13]

Please work on the type in your posts. You come off sounding very uneducated. Not to mention, it is very unprofessional. There are other sites that don't mind it though, feel free to go there.

I feel the same way every time I read his posts. Often times, I have to read them more than once just to understand what he's trying to say. I PMed him about it and he told me to "Get used to it"

im not wasting money what im wasting 20 maybe 40 cents for cleaner and better gas OH MY GOD!!!! and i didnt say get used to it i said I had to get used to it bec of texting im and stuff like that and how old r u guys bec im 13 and i under stand all this stuff if u guys r older u wont understand if u hav kids check out how they type its prbly the same thing

[.sinner]

I'm 16 I text and IM people but and abbreviate there but there are places where you can and should talk like a normal person

[Asmith]

im not wasting money what im wasting 20 maybe 40 cents for cleaner and better gas

What makes you think higher octane fuel is better and cleaner???

[candlewick96]

im not wasting money what im wasting 20 maybe 40 cents for cleaner and better gas

What makes you think higher octane fuel is better and cleaner???

The misconception about things more expensive being better? Litle(sic)boy, try diesel. Its octane rating is even better than premium gas.

BTW (sic) is not the same as "sick." Much as it sounds funny, I don't do stuff like that. (sic) is a literary tool to designate the writer's acknowedgement that he is re-posting word/s that he knows may contain error/s.

[zak13]

im not wasting money what im wasting 20 maybe 40 cents for cleaner and better gas

What makes you think higher octane fuel is better and cleaner???

The misconception about things more expensive being better? Litle(sic)boy, try diesel. Its octane rating is even better than premium gas.

BTW (sic) is not the same as "sick." Much as it sounds funny, I don't do stuff like that. (sic) is a literary tool to designate the writer's acknowedgement that he is re-posting word/s that he knows may contain error/s.

it works better and is faster then usin 87 and y dont u try diesel fuel and i dont care if they contain errors its how every one i know talks so if u dont under stand it too bad get used to it aight and how old r u guys seriously

[Asmith]

im not wasting money what im wasting 20 maybe 40 cents for cleaner and better gas

What makes you think higher octane fuel is better and cleaner???

The misconception about things more expensive being better? Litle(sic)boy, try diesel. Its octane rating is even better than premium gas.

BTW (sic) is not the same as "sick." Much as it sounds funny, I don't do stuff like that. (sic) is a literary tool to designate the writer's acknowedgement that he is re-posting word/s that he knows may contain error/s.

it works better and is faster then usin 87 and y dont u try diesel fuel and i dont care if they contain errors its how every one i know talks so if u dont under stand it too bad get used to it aight and how old r u guys seriously

We are all really old.

Most of us went to school back when the official language was English.

If you are not running a high compression piston, you might be surprised at the power you get from the 87 octane gasoline.

The lower octane fuels have a faster flame spread rating and therefore will burn faster and more completely. You will achieve more power as more of the fuel is burnt.

Higher octane fuels have a higher ratio of Xylene added to make them burn slower and ignite at a higher temperature so that the compression doesn't cause preignition (pinging). Xylene has a lower BTU rating than does Gasoline.

Bottom line = lower octane in a low compression engine equals more power.

Aight?

[candlewick96]

LitleBoy, [b]I AM YOUR FATHER.....[/b]