GrumpyOldMan
Member
- Joined
- Feb 10, 2007
- Messages
- 562
- Reaction score
- 2
....well I had a major BRAIN FART the other day and did just that - I pumped 6.5 gallons of 87 into my truck and about DIED!!
:thumbdown:
I was in a panic about how much I had to baby it and asked gadget about it...well I ALSO did some reading online and found the following page that tells you how to calculate the resulting octane of your fuel mix which is AWESOME to know!!
http://www.racegas.com/article/52
Anyway, I did the math on my boo boo and found this (excerpt below):
so in my case that is :
21 gallons total, 6.5 of 87 in it means:
6.5 gal @ 87 (6.5 / 21 = 0.3095 or 31%)
14.5 gal @ 93 (14.5 / 21 = 0.69 or 69%)
so substituting we get
( 0.31 x 87 ) + ( 0.69 x 93 )
26.97 + 64.17 = 91.14 Octane
HURRAY!!! I still have a tank full of 91 octane so boosting SHOULD be safe on the tune Gadget gave me (I'm sure he'll chime in tonite if it's not) HOWEVER I intend to drive like a Prius owner down to that station and top it off with 100 octane which means maybe 2 gallons by the time I get there....JUST TO BE SAFE!!
the BONUS is that I now know where I can routinely lighten my wallet for a tank FULL of 100 octane should I want it (not till I get a beefed bottom-end and a tune that will use it!)
IN CONCLUSION.... if ya ever screw up like I did, just do the math and see if you are okay!!
Dave - a relieved boosted X-runner owner
:thumbdown:
I was in a panic about how much I had to baby it and asked gadget about it...well I ALSO did some reading online and found the following page that tells you how to calculate the resulting octane of your fuel mix which is AWESOME to know!!
http://www.racegas.com/article/52
Anyway, I did the math on my boo boo and found this (excerpt below):
Then, use this equation to find your octane:
( [ % Fuel A ] x [ Octane of Fuel A ] ) + ( [ % Fuel B ] x [ Octane of Fuel B ] ) = Octane of Mixture
( [ % Fuel A ] x [ Octane of Fuel A ] ) + ( [ % Fuel B ] x [ Octane of Fuel B ] ) = Octane of Mixture
so in my case that is :
21 gallons total, 6.5 of 87 in it means:
6.5 gal @ 87 (6.5 / 21 = 0.3095 or 31%)
14.5 gal @ 93 (14.5 / 21 = 0.69 or 69%)
so substituting we get
( 0.31 x 87 ) + ( 0.69 x 93 )
26.97 + 64.17 = 91.14 Octane
HURRAY!!! I still have a tank full of 91 octane so boosting SHOULD be safe on the tune Gadget gave me (I'm sure he'll chime in tonite if it's not) HOWEVER I intend to drive like a Prius owner down to that station and top it off with 100 octane which means maybe 2 gallons by the time I get there....JUST TO BE SAFE!!
the BONUS is that I now know where I can routinely lighten my wallet for a tank FULL of 100 octane should I want it (not till I get a beefed bottom-end and a tune that will use it!)
IN CONCLUSION.... if ya ever screw up like I did, just do the math and see if you are okay!!
Dave - a relieved boosted X-runner owner