Octane?

Post by **SilviaS14KA24DE** » Mon Mar 15, 2004 11:24 pm

Ok, my car did not come with an Owners' Manual. I want to know what the recommended Octane for teh 95 SE's are. this thread better not debate what octane is better! haha cause it's a never ending argument...

Post by **DAEDALUS** » Mon Mar 15, 2004 11:24 pm

"Use unleaded premium gasoline with an octane rating of at least 91 AKI (Anti-Knock Index) number (research octane number 96).If unleaded premium gasoline is not available, unleaded regular gasoline with an octane rating of at least 87 AKI (research octane number 91) can be used.However, for maximum vehicle performance, the use of unleaded premium gasoline is recommended."

Post by **XCrunner19420** » Mon Mar 15, 2004 11:24 pm

I think every car manual ive read has recomended 93 or above.

Post by **240marcuSX** » Mon Mar 15, 2004 11:24 pm

the 240's run best with the cheap stuff at no more than $5 at a time.

unless your engine code ends with T.

Post by **whiterps13** » Mon Mar 15, 2004 11:24 pm

240marcuSX wrote:the 240's run best with the cheap stuff at no more than $5 at a time. unless your engine code ends with T.

your joking right? also, never let your car run below 1/4 of tank. i have had bad experiences in my 300zx below 1/4.

Post by **Onizuka** » Mon Mar 15, 2004 11:24 pm

If your using anything other than 87 octane on your stock motor your wasting money.

Post by **GEO** » Mon Mar 15, 2004 11:24 pm

yeh...

Post by **240marcuSX** » Mon Mar 15, 2004 11:24 pm

yeah, although that is the situation in most cases with me. i use the cheap junk. i just dont buy gas from certain stations. only after turbo will i get 93.

Post by **DAEDALUS** » Mon Mar 15, 2004 11:24 pm

Maybe I should have been more explicit. My first post was quoted directly from the '95 240SX FSM.

Post by **xyster** » Mon Mar 15, 2004 11:24 pm

I use only BP/Amoco 93 octane from high-traffic stations.

Post by **zion** » Mon Mar 15, 2004 11:24 pm

xyster wrote:I use only BP/Amoco 93 octane from high-traffic stations.

same here, Amoco white gas is the best i have used, I dont really trust anything else...

Post by **POS_S13** » Mon Mar 15, 2004 11:24 pm

93 octane? daym in CA the highest i've seen is 91, unless you go to the track and get 110

Post by **SilviaS14KA24DE** » Mon Mar 15, 2004 11:24 pm

lol yeah only 91 in ca. i've been putting in 87. i've seen no problems cause i've been putting 76 gas (no cheap ARCO or Costco gas).

Post by **Zydeco** » Mon Mar 15, 2004 11:24 pm

Well Id like to use 91 but I have bills and rent to pay so I only use 89, also I have never had a problem running below a 1/4 tank.

Post by **SilviaS14KA24DE** » Mon Mar 15, 2004 11:24 pm

me also. never had problem running 87 octan below quarter tank.

if there is something wrong with your car with or less than a quarter tank of gas, maybe something is wrong with the pressurization. Gas pump? Filter? Injectors? stuff like that

Post by **[Zero-S]** » Mon Mar 15, 2004 11:24 pm

I ran 93 in it every tank. My parents hated me, b/c I'd ***** at them everytime they'd put anything else in it (hey, if they were gonna use my car, they were gonna pay to put gas in it, dammit). But then again, my timing was advanced to the point where it would knock if I didn't run 93...

Post by **s13inutah** » Mon Mar 15, 2004 11:24 pm

Dude in utah we've got nothing above 91 and the price for even that is way up there

Post by **Smurf6x6** » Mon Mar 15, 2004 11:24 pm

The fuel in your tank is what the pump uses to lube the motor in the pump. For it to be lube it has to be completely submerged in gas, so when your running it at 1/4 tank or under it's not submerged in gas, causing the motor to run dry.

Post by **Toms240420** » Mon Mar 15, 2004 11:24 pm

did you all realize that like 38 cents of EVERY gallon you by is TAX. 1.38 really only cost a dollar dammit.

Post by **Shawn Clark** » Mon Mar 15, 2004 11:24 pm

Smurf6x6 wrote:The fuel in your tank is what the pump uses to lube the motor in the pump. For it to be lube it has to be completely submerged in gas, so when your running it at 1/4 tank or under it's not submerged in gas, causing the motor to run dry.

If it were running dry...you would not be getting any fuel and the car would soon stop running...and the fuel pump would shut off. Now perhaps running only partly submerged could increase wear, don't know, haven't looked at the geometry that closely or played with the pump. If it is pumping any fluid it should be lubricating itself unless it is poorly designed. I've always run my new vehicles from full to near empty before refilling and have yet to see that cause a problem, but I've only got about 120 K miles on each of them now.

Post by **DAEDALUS** » Mon Mar 15, 2004 11:24 pm

True. The pickup hose is below the pump. Lubrication is not the issue, but temperature is. Long term, a cooler pump (or any electrical motor) will most often last longer than a hotter one. Keeping the pump submerged in gas will keep it cooler.

Post by **Smurf6x6** » Mon Mar 15, 2004 11:24 pm

Yah but doesn't it stay cooler though lubrication?

Post by **DAEDALUS** » Mon Mar 15, 2004 11:24 pm

Cooler than without lubrication? Yes. Cooler than when submerged in gas? No. You can cool it from the inside only or from the inside and the outside. The pump generates a certain amount of heat. Varying the amount of cooling will ultimately vary the final, steady state temp of the component.

Post by **BoostFab** » Mon Mar 15, 2004 11:24 pm

I was beating the h3LL out of my stock KA motor with octane 87 for years, no problem.

when you are turbocharging your motor, you should always use highest octane your gas station offers (93)

Octane?

Octane?

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