S2000 Under The Hood S2000 Technical and Mechanical discussions.

im only getting 40 miles on a quarter tank....

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Old 08-08-2011, 10:09 AM
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Lower grade gas does not cause a CEL, the computer will adjust for it and you will lose power while running that gas so that the engine maintains its safety margins
Old 08-08-2011, 12:22 PM
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Originally Posted by WolfpackS2k
Originally Posted by Speakeasy2009' timestamp='1312650883' post='20853767
OK.. i just filled it up after going 68 miles and i added 2.7 gallons to the tank until the pump stopped. So i guess im getting around 20 to 24 in my estimation. guess its about right. Now that im full im gonna run the car until i see the gas light come on and see what the total is.

Also, im new to the S2K and only just got mine. Should I always use 93 grade gas?? I had no choice but to add 89 today to the gas already in the tank which was 93. After the fact i thought maybe adding the 89 was a bad idea....

If you only needed 2.7 gallons to fill up the tank, why did you have "no choice but to add 89"? Sounds like you had plenty of fuel still in the tank? Anyway, always put in 91 octane or higher.
He really wanted to know his MPG that badly.
Old 08-09-2011, 10:46 AM
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Like everyone else post...fill up your tank and then calculate. I get on average 295-310 to a tank. My worst week ever, 200 to a tank. I was literraly in vtec all day lol

Someone said not to use seafoam, can you please explain why?
Old 08-09-2011, 11:08 AM
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Originally Posted by WolfpackS2k
Originally Posted by Speakeasy2009' timestamp='1312650883' post='20853767
OK.. i just filled it up after going 68 miles and i added 2.7 gallons to the tank until the pump stopped. So i guess im getting around 20 to 24 in my estimation. guess its about right. Now that im full im gonna run the car until i see the gas light come on and see what the total is.

Also, im new to the S2K and only just got mine. Should I always use 93 grade gas?? I had no choice but to add 89 today to the gas already in the tank which was 93. After the fact i thought maybe adding the 89 was a bad idea....

If you only needed 2.7 gallons to fill up the tank, why did you have "no choice but to add 89"? Sounds like you had plenty of fuel still in the tank? Anyway, always put in 91 octane or higher.

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