two questions really here: 1. has anyone noticed a difference putting in less than 91 octane in your wrx?? 2. on several occasions, the gas pump has kicked off with the auto stop, and gas has spilled out. this has never happened with any of my other cars. i guess i could slow the pumping when i hit >11 gal. but wondering what ur experiences are. It may sound dumb, but i would appreciate a few honest answers. the rest can flame on.....

 

1.) Less then 91 octane is bad for your car and should only be used in emergency situtations. using less then 91 may cause the engine to start pinging, which can cause long term damage. You will also notice decreased performance on less then premium gas.


2.) I usually let the pump sit for about 10 seconds or more before I pull it out, shaking it all the while so I don't spill any. If you are still spilling gas, then I don't know what to say.

 

it spills out right b4 it cuts off, mebbe i should pump slower right at cutoff then??

 

I can only think that the breather tube is somehow pluged. The one that goes to the fuel tank. Do you have an aftermarket in tank fuel pump? And if so is the breather tube connected properly

Source of info:
On my previous cars and dropping the gas tank i noticed a tube that was used to let air escape when fueling up. This prevented the bubbles in the tank that would presurize when it started getting full.

I theorize that the pressure of air trapped in the top of the tank pushed the gas out of the tank becuase it had to buble to the surface so to speak. Thus it spilled.

 

thanks 4 the info. it's all stock, so maybe it's defective?? it seems like an isolated case to me so far...

 

Possibly, you could always ask your dealer about this if its a constant thing. I'm sure their service department has an answer.

 

Make sure that you put the nozzle in the tank as far as it will go. That will make it stop a bit sooner and should keep it from spilling.

 

1. Never put in less than 91 Octane. It's usually only $.20 more per gallon, which is like $2 per fill up. You can afford the cost difference in $2 increments right?

2. I'm not sure on your issue. If you want, I could move this thread to 'Maintenance and Warranty" and you might get better responses there. I didn't move it yet because it's right on that line of General/Maint As for me, mine stops when it's full, and for some reason that seems to be 13.9xx gallons every time No overflows though.

 

You'll notice a difference alright but not what you were expecting.
When your ECU switches to the rich fuel map (which helps protect the engine from detonation) it runs pig rich. If you think your fuel economy is bad now...

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"…axles of evil…" - george w. bush

 

thanks for the replies. I've never actually put in less than 91 octane, it was just a question, i got what i needed from all of the great i-clubbers, thanks y'all!!!