what kind of gas do you use? does it affect the way your rotary runs? i know for piston engines it make it knock less, but anything for our cars?

 

Good question, I would like to know myself.

 

for N/A all you need is regular, for turbos the normal rules apply, so run high octane

 

I use the "cheap ****", but it really isn't all that cheap.

 

seriously, $1,47 for the "cheapo ****" isn't cheap at all

 

My car runs best with High octane, maybe it was because its been tuned to run with it.

 

premium stuff plus 108+ octane booster

 

the lower the octane the better in n/a's. too abd we dnot have mexican gas over here

 

i tried running 89 in my car once... ran like a dog.. never again. only 87 for me..

 

Jersey gas is historically cheaper than most states. It has something to do with the fact that we DON'T/CAN'T pump our own gas.

 

In Holland we got 2 choices

Euro 95 and Euro 98

But for our 'cheap' gas (Euro95@a small local gasstation with an unknown brand of gas. It's more like Euro92 or something) we have to pay around 50 USD a tank.

And with a lot of stop&go traffic and constant trafficjams we burn a lot of fuel.

 

i dont see why cheaper gas is better in rotary. i use premium plus 108+ and it run smother and better that 87 octane. probably my car is stupid or something

 

Must be one of those safety issues.

 

For those folks using anything more then 87octane gasoline, I hope you are running boost or your wasting money.

 

HIGH FIVE!

hehe yeah
our cars already have enough trouble igniting gas as it is, no need to make it tougher by using higher octane
now in turbo apps you dont wanna knock
i just rolled outta bed at 4 in the pm so it may sound a little odd

 

i dont see the reason, anyway im going to run with boost

 

This "the lower the better" thing doesn't seem to be clear for me... First: 87 **** is only available in development countries, even Germans sell nothing less the 90... I always use 95, cause it's the lowest/cheapest you can get in Belgium. Once the turbo is on, I'll go for 98 or higher. The quality of the fuel does matter. Octane of course doesn't always means quality, but still. No cheap stuff in my car...
And my car DOES not have problems igniting/burning fuel at all...

 

Ugh. More octane discussions. Due to the nature of the rotary's combustion chambers (they're high turbulence, so they don't tend to get hot spots), high octane gas isn't necessary at all (high-boost turbo aspiration cars excepted, of course). The octane rating also has nothing to do with the quality of the gas, as rotary emotions said. I run 87 in mine, cause its the lowest i can get without buying n-heptane (0 octane) from a chemical supply place. I tried running 89 octane gasahol in my car over the summer, cause it was the same price, and it caused my car to vapor lock, so I quickly switched back to the cheap stuff.

 

87 is good UNLESS your running Turbo,

Heres soemthing you guys might not know but this si what I do,I go to the MSN site,and type in my area code to find the cheapest gas in my area,I have done this for about the last month and a half and have saved up as much as 20 cents per gallon.

Try it..

 

I've used that too. A month ago, I got a gallon for 99 cents at a somewhat local station. Pretty cool stuff.

 

Cheap **** is good enough for my 82 GSL...it's all stock. Anything more could actually cause long term damage to your engine if it is not designed for a higher octane gas.

And anways....cheap **** is not cheap damn it...$1.50 here right now...it sucks.

 

I tried running the cheap **** when gas prices went up but the car didn't like it too much. Didn't run as smooth

 

ok heres the thing about octanes.... this was a topic with the SRX7 guys last season...

a stock rotary engine runs best with 87 octane. YES, it makes a difference, and YES, WackyRotary is right in that your probably wasting your money on anything higher with a STOCK engine.

87 octane burns a little bit slower than midgrade or premium, so the theory is.... the 87 fuel burns in a streak as a the rotor is spinning, as opposed to the Premium which would burn up almost instantly. it will also burn slower and fill the long, thin combusion chamber of a rotary. Premium will burn in a short, fat explosion like the combusion chamber of a piston engine.

--eric

 

stupid question, but for the sake of knowledge, can someone explain to me why a turbo car needs higher octane, even in a rotary? im glad i started this post before i actually went and tried it. ive been debating it for awhile, and i figured i would ask before i do it, glad i did

 

I hate to tell you, but octane has nothing to do with burn rate. The octane rating refers to the gas' resistance to ignition. The higher the octane rating, the more resistant the gas is to preignition. Hence, while the burn rate of 87 and 91 octane gas will be the same, more energy will be required to ignite the 91 octane stuff (the 91 octane has a greater "activation energy"). Because turbo cars have a higher compression ratio than N/A cars, they require a fuel which has a higher resistance to preignition so they don't ping.