premium gas

[MunG35]

wut are the benefits and disadvantages of using premium gas in a civic... say like my 95 DX Sedan?

[Jas_M]

My mechanic claims that it's good to use it once in a while to help clean the carbon off of either the spark plugs, or the injectors, i forget which. I'm a mechanical retard, so i have no idea if this is true or not. Maybe someone else here knows for sure.

[jcrx]

For that motor, none really. The compression isn't high enough, and as shitty as it is 89 will work as well as 93.

[Beastiek2]

i heard u get like a litle bit more miles per gallon but who knows i see no difference

[97CivicX]

im about to do a little testing with my lx, im just waiting to use every lil bit of gas i ahve then fill it up with premium. i can get about 300mpt with 89 but we'll see. anyone else test it out before?

[Ace$nyper]

nada if it doesn't knock using 87 then use that. I use it before smog testing thats only time and thats just to make me feel better.

[PoisonFangs]

I use 93 in my car cause im running a nitrous system, but when im not planning on spraying for a while i just use 87.

[snowman2005]

u get riped off so bad for using premium

[PoisonFangs]

well some cars need it to stop knocking and pinging but, alot dont, thats why I only use it once and a while. And I dont know about you guys but priced in Chicago are going up like crazy.

[kicker1_solo]

Originally Posted by PoisonFangs

well some cars need it

such as my gsr, the more powerful vtec motors require it.

[integrasedan]

for a stock 95 civic DX, you would be wasting money by putting in premium gas. since the compression isn't high enough to burn most of the premium gas=carbon deposits, ruin cat and oxygen sensor over the long run.

stick with regular and if ping/knock, use plus gas instead of premium.

Gas octane number ratings means it's pre ignition performance, the higher the octane, the less pre ignition risk.

high compression cars need higher octane gas because they have higher combustion temperature and using lower will increase risk of pre ignition.

the most misconception about using higher octane gas is that it will give you power. If your car doesn't meet the requirements for higher octane, then you won't get any benefits.

Go to Chevron or Mobil website, they will state the facts about higher octane gas.

[megaman277]

so what do you guys recommend for a sohc vtec?

[GScivic7]

Originally Posted by megaman277

so what do you guys recommend for a sohc vtec?

whatever is recommend in the owner's manual. Unless your engine is knocking or pinging like it's already been stated, then move up one grade.

[mycivic]

Ive used 91 for a while and for some reason, I get better gas mileage by like +1 or 2 miles a gallon. But it really wont have an effect. As stated already, the higher the octane rating...more resistance to pre-detonating. High octane rating is for higher performance engine with high C/R. I alwas had the misconception before that using higher octane rating will get you more power blah blah blah. Did some reading and its only a waste of money. I just use 89 even if required fuel is 87. I use 89 as "preventive maintenance" just to make me feel better and prevent maybe once in a while knocking if I used 87. But it really wont do any good using 91+ octane rating on ordinary civic engines (unless they were the B16's, K20's etc...).

[Al_Bundy]

i always use premuim gas in my '71 Dodge, even though i don't make much...