attendant GAVE ME 3 GALLONS OF REGULAR
Wow you guys aren't very cautious.
To the OP - use some octane booster to be safe.
If a station has pumps with only one nozzle, I drive around to find the pump that was dispensing 91 octane (highest in CA) before I got there. I'm paranoid because some fuel always stays in the hose. I don't even want a splash of lower octane fuel in my tank.
I do it now what I have a bunch of HP but I used to do this when my Evo was stock as well.
To the OP - use some octane booster to be safe.
If a station has pumps with only one nozzle, I drive around to find the pump that was dispensing 91 octane (highest in CA) before I got there. I'm paranoid because some fuel always stays in the hose. I don't even want a splash of lower octane fuel in my tank.
I do it now what I have a bunch of HP but I used to do this when my Evo was stock as well.
You are waaaay to cautious if you are worried about a splash of lower octane, it all mixes up in the tank, not like you'll hit a bad spot of gas in the tank and the engine will explode. (I'm not talking about water or gas that has been sitting for months obviously)
3 gal of 87 mixed with 9 gal of 93 is 91.5 so stay out of boost/wot like people are saying and you'll be fine.
3 gal of 87 mixed with 9 gal of 93 is 91.5 so stay out of boost/wot like people are saying and you'll be fine.
Evolving Member
Joined: Mar 2006
Posts: 112
Likes: 5
From: NJ
+1^
Why is it that you'll fine if you stay out of boost? I learned something and just wanted to share this.
"The octane rating of gasoline tells you how much the fuel can be compressed before it spontaneously ignites. When gas ignites by compression rather than because of the spark from the spark plug, it causes knocking in the engine. Knocking can damage an engine, so it is not something you want to have happening. Lower-octane gas (like "regular" 87-octane gasoline) can handle the least amount of compression before igniting. "
Why is it that you'll fine if you stay out of boost? I learned something and just wanted to share this.
"The octane rating of gasoline tells you how much the fuel can be compressed before it spontaneously ignites. When gas ignites by compression rather than because of the spark from the spark plug, it causes knocking in the engine. Knocking can damage an engine, so it is not something you want to have happening. Lower-octane gas (like "regular" 87-octane gasoline) can handle the least amount of compression before igniting. "
Umm read the op's story before you pass judgement. The car will knock, ecu will pull timing, possibly go into limp mode for prolonged knock, ecu saves engine. 3 gallons of 87 with the rest at 93 comes to about 91 with a 12 gallon fill. 91 is completely acceptable within the cars range.
Evolving Member
Joined: Jul 2008
Posts: 151
Likes: 0
From: LosAlamitos
Umm read the op's story before you pass judgement. The car will knock, ecu will pull timing, possibly go into limp mode for prolonged knock, ecu saves engine. 3 gallons of 87 with the rest at 93 comes to about 91 with a 12 gallon fill. 91 is completely acceptable within the cars range.
