Mixing Gas?

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Old Feb 6, 2009 | 07:56 AM
  #16  
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Originally Posted by saqwarrior
Don't they have 100 octane at the gas station in Woodside at the bottom of 84 near 280? If memory serves, it's at a pump round the back of the station and you have to ask to use it.
It's on Woodside road, it's a 76 station and you pull up to any pump and select the blue button that says "100" on it... No secret pump haha. Been this way for years. I haven't been there since I sold my 240Z but last time (November of '08) it was just under $6/gal.
Old Feb 6, 2009 | 08:41 AM
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whats the big mystery? mixing 1/2 87 with 1/2 93 = 100% 90

90 is in the middle of 87 and 93 IIRC

You might save a few pennies since it seems like 93 is always 15 cents higher...but talk about penny pinching, i thought i was a cheapskate
Old Feb 6, 2009 | 09:58 AM
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where in california is there 93? I want I want
Old Feb 6, 2009 | 10:35 AM
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Nobody knows crap around here?

Mixing octanes will result in a octane level between the two depending upon the ratio... but WHO CARES. Cars are either designed for 91 or 87. This is how the "midgrade" is made at the pumps! There is no "midgrade" tank... it's mixed from the 91 and 87.

If you have a high compression or turbo charged car that requires 91 then you have to put 91 in. If you don't, then it's usually designed for 87... FOR WHICH YOU WOULD GET NO BENEFIT FROM PUTTING THE 89 IN.
Old Feb 6, 2009 | 10:39 AM
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yeah...

gas prices usually go $.10 higher on each level...but Premium sometimes is $.15 or $.20 (should be $.50 higher IMO)

you would probably save more if you pumped 3/4 mid and 1/4 premium (since premiums price is usually jacked up and uneven amount)
Old Feb 6, 2009 | 11:13 AM
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Who uses mid grade anyway?? I never understood the point.
Old Feb 6, 2009 | 11:27 AM
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Originally Posted by EQ Tuning
Who uses mid grade anyway?? I never understood the point.
Exactly, if they just made 87 and 93, we'd all be set.
Old Feb 6, 2009 | 11:30 AM
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i use midgrade because LIC told me to. If you want to question them go ahead

a little octane never hurt anyone.

Its not like making midgrade available raises the overall price of gas! getting rid of midgrade wouldn't help anyone's situation. Pump handle companies would lose 1/3 of their business lol.
Old Feb 6, 2009 | 12:11 PM
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Costco sells 87 and 91, and they don't seem to be hurting for business.
Old Feb 6, 2009 | 03:07 PM
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Originally Posted by kYLEMtnCRUZr
i use midgrade because LIC told me to. If you want to question them go ahead

a little octane never hurt anyone.

Its not like making midgrade available raises the overall price of gas! getting rid of midgrade wouldn't help anyone's situation. Pump handle companies would lose 1/3 of their business lol.
Your car must be n/a and custom tuned eh?
Old Feb 6, 2009 | 03:27 PM
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just NA, nothing custom on my car except mudflaps and seat mount
Old Feb 6, 2009 | 04:44 PM
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The first page of this thread made my head hurt.
Old Feb 6, 2009 | 09:06 PM
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Originally Posted by kYLEMtnCRUZr
just NA, nothing custom on my car except mudflaps and seat mount
I'm trying to figure out why LIC would tell you this. I'm guessing gas was either cheap, or they thought that you wanted max performance at whatever cost.

The higher than needed octane insures that you car will not be hindered by your current map. Since actual octane can be inconsistent at the pump, the only way to guarantee you will get your necessary 87 is to go up a little more and ask for 89.

But this thread is about "cost". Which in that case, a 89 is pointless.
Old Feb 6, 2009 | 09:58 PM
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Originally Posted by saqwarrior
Don't they have 100 octane at the gas station in Woodside at the bottom of 84 near 280? If memory serves, it's at a pump round the back of the station and you have to ask to use it.
76 around the almaden/curtner area has 100
Old Feb 6, 2009 | 10:27 PM
  #30  
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Originally Posted by chimchimm5
I'm trying to figure out why LIC would tell you this. I'm guessing gas was either cheap, or they thought that you wanted max performance at whatever cost.

The higher than needed octane insures that you car will not be hindered by your current map. Since actual octane can be inconsistent at the pump, the only way to guarantee you will get your necessary 87 is to go up a little more and ask for 89.

But this thread is about "cost". Which in that case, a 89 is pointless.
they told me this because they see the effects of detonation in the countless engines they pull apart. so to prevent or ensure detonation not to happen, why not throw an extra dollar in your tank each fill-up. cheap insurance if you ask me. No matter what the gas prices, mid grade is always only $.10 more

even if you cant hear the detonation happening, im sure it happens in certain conditions, like if its hot out etc. no need to throw firecrackers in your cylinder before it hits TDC...sounds e$$pensive



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