J Nick

I know this has been asked recently but I can not find it.

I live in S Flor - gas is up, assume I can tolerate less power.

Will my engine and other effected components suffer, have life shortened, etc if I go with a lesser octane then the 91 I have been using for its first 50k miles?

Thanks
Nick

terahertz

don't do it.

s2krey

Not good for car if used for a long time with lower grade.

J Nick

so the parts suffer?, get damaged?

s2kobsession

don't do it

....detonation.....

J Nick

what about detonation? just trying to understand a little bit - take a phase or 2 - and hopefully along the way sometime I can contribute - thanks

Seattle2k

yes, they certainly do suffer. detonation is not good.

shotiable

lets calculate:
lets assume we are located here in california where the price of gas is royally a bitch and is super expensive...
if the price of premium fuel (91) is at 4.69 a gallon for premium
the price of mid-grade (89) fuel is at 4.49
and the price of regular grade (87) is 4.39

the difference between 91 and 87 is 30 cents.
the difference between 91 and 89 is 20 cents.

30 cents more than $4.39 is a difference of 6.83%
20 cents more than $4.39 is a difference of 4.26%

that being said, i want to say that in conclusion, its not worth it to get 87 octane gas for your 91 grade ONLY S2000 because the difference in price between 91 and 87 or 89 is now SO insignificant due to the VERY high gas prices.

just a thought

shotiable

would you really wanna break your $30,000 car to save 6.83% on your gas bill? hehehe i didnt think so

terahertz

lower octane gas can detonate (aka ignite before spark plug fires). that is called knock. knock is not good. engine has a knock sensor, but will not compensate until knock is felt. the word detonation doesnt sound good, so i wouldnt do it lol