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plus gas

  

status -> plus gas (7/17/2008 3:58:35 PM)

i tried to search it but seeing how half of haf is down its a lil hard, simple enough question is putting chevron plus "the middle grade gas" in my car bad? some dude at work said i was killing my car.

  
03Sleeper -> RE: plus gas (7/17/2008 6:21:13 PM)

Uhhh....tell that guy to go soak his head. Technically, you are treating your car since it is designed for 87 octane. mid-class is 89 i believe.

KevinAccord -> RE: plus gas (7/18/2008 5:37:44 AM)

yeah, I agree...
Just to add on the octane topic, if your car is stock, 93 octane will be a waste of $$$. your car is designed to work w/ 87/89...so that said... mmmmmm.... im done writing now...

00AccordLX5spd -> RE: plus gas (7/18/2008 6:47:04 AM)

Your car was designed to run on 87.  89 may not hurt it, but it is a big waste of $ since it does not help anything. You will actually get worse gas mileage too.

JimBlake -> RE: plus gas (7/18/2008 8:52:16 AM)

quote:

ORIGINAL: 00AccordLX5spd

... You will actually get worse gas mileage too.

Very tiny difference in my experience.  Still a waste of money.

00AccordLX5spd -> RE: plus gas (7/18/2008 9:33:16 AM)

^ yeah I know.  One thing that has been making me mad about gas recently: almost every gas station I have gone to has a sign on the pump that says "Contains 10% Ethanol".  That means I will get worse gas mileage correct?

03Sleeper -> RE: plus gas (7/18/2008 10:49:26 AM)

Correct-o-mundo. "/

JimBlake -> RE: plus gas (7/18/2008 10:56:53 AM)

Energy content (LHV for the geeks)

Iso-octane = 110k BTU/gallon
Ethanol = 76k BTU/gallon

A 90/10 mixture should be about 106k or 107k, so thats about 3% worse.

klrspz -> RE: plus gas (7/18/2008 12:07:38 PM)

HAF is pissing me off... octane means nothing about performance, but rather anti-knocking...
read this: http://www.howstuffworks.com/question90.htm
and: http://en.wikipedia.org/wiki/Octane_rating

sUbLiMe96 -> RE: plus gas (7/21/2008 9:31:23 AM)

just to add on this ...(BTW i did not read the link) ... Its funny for some1 to mention this knocking issue .... when I had my M3 (imported high performance model) i had this chick fill me up on fuel for some $$$ she owed and the biatch put 87-octane ...
the car started knocking.....?  I know it was because of that...If I remember correctly the M3 i had required a minimum of probably the 93 but was designed to run best on even higher? (i think octane rating might be higher in Europe?)

KevinAccord -> RE: plus gas (7/21/2008 11:17:40 AM)

yeah, octane is higher in Europe, and gas is more expensive too.
After reading the link (thnx 4 the link), I learned that higher compression engines require higher octane rating. Octane # means the compression it can handle before self-igniting

KevinAccord -> RE: plus gas (7/21/2008 11:24:24 AM)

I don''t understand why a 87 engine would spend more gas using 93... though it would be a waste of $$$, it wouldn''t be of gas... its =...

klrspz -> RE: plus gas (7/21/2008 11:26:16 AM)

The octane number is a ratio of iso-octane to heptane to perform the necessary anti-knocking capacity.

KevinAccord -> RE: plus gas (7/21/2008 11:43:54 AM)

yeah, but anti-knock means that it would not detonate before it''s supposed to, due to the fact that the gas can''t handle higher compressions.

JimBlake -> RE: plus gas (7/21/2008 3:29:52 PM)

Speed of the flame-front is sorta indirectly related to anti-knock-index, but slower flame-front = less pressure in cylinder.

  

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