08-08-2009, 09:45 PM
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#1 (permalink)
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My Goal: 35 MPG All City
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Were my tires throwing off my fuel logs? Help
Hey I was looking at a profile on here where someone said that the tires on their car or whatever it was were 6% bigger then the stock so he calculated the 6% into the fuel logs for 6% addition to the miles driven. The tires I had on for a while are 10% bigger then the stock/ones I have on now. Was I suppose to add in that 10% 
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08-08-2009, 09:57 PM
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#2 (permalink)
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Moderate your Moderation.
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Yes. :P You screwed up.
What you actually have to do is calculate the difference in rolling circumference, not diameter. You add in the % difference of the circumference, since you've gone that much further.
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08-08-2009, 10:01 PM
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#3 (permalink)
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My Goal: 35 MPG All City
Join Date: Mar 2009
Location: South Carolina
Posts: 616
Thanks: 20
Thanked 14 Times in 13 Posts
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Quote:
Originally Posted by Christ
Yes. :P You screwed up.
What you actually have to do is calculate the difference in rolling circumference, not diameter. You add in the % difference of the circumference, since you've gone that much further.
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So can you tell me what I need to do to my fuel logs for when I had those tires on? add or subtract from them and by how much? |
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08-08-2009, 10:02 PM
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#4 (permalink)
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Moderate your Moderation.
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If your tires were 10% bigger circ, you add 10% to the miles driven.
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"¿ʞɐǝɹɟ ɐ ǝɹ,noʎ uǝɥʍ 'ʇı ʇ,usı 'ʎlǝuol s,ʇı"
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08-08-2009, 10:16 PM
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#5 (permalink)
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My Goal: 35 MPG All City
Join Date: Mar 2009
Location: South Carolina
Posts: 616
Thanks: 20
Thanked 14 Times in 13 Posts
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Quote:
Originally Posted by Christ
If your tires were 10% bigger circ, you add 10% to the miles driven.
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So that chart is correct? I DO use 10% in this situation?
If so then for ex. if I drove 300 miles I should take 10% from 300 and add it to the 300, that being 330 and put 330 in the place of the 300 right? |
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08-08-2009, 10:21 PM
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#6 (permalink)
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Moderate your Moderation.
Join Date: Nov 2008
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__________________
"¿ʞɐǝɹɟ ɐ ǝɹ,noʎ uǝɥʍ 'ʇı ʇ,usı 'ʎlǝuol s,ʇı"
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08-08-2009, 10:23 PM
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#7 (permalink)
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My Goal: 35 MPG All City
Join Date: Mar 2009
Location: South Carolina
Posts: 616
Thanks: 20
Thanked 14 Times in 13 Posts
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Quote:
Originally Posted by Christ
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are you 100% sure before I go and modify 9 of my fuel logs 4ever? |
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08-08-2009, 10:26 PM
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#8 (permalink)
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Moderate your Moderation.
Join Date: Nov 2008
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Quote:
Originally Posted by RandomFact314
are you 100% sure before I go and modify 9 of my fuel logs 4ever?
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Do I have to support my statements with logic?
__________________
"¿ʞɐǝɹɟ ɐ ǝɹ,noʎ uǝɥʍ 'ʇı ʇ,usı 'ʎlǝuol s,ʇı"
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08-08-2009, 10:28 PM
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#9 (permalink)
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My Goal: 35 MPG All City
Join Date: Mar 2009
Location: South Carolina
Posts: 616
Thanks: 20
Thanked 14 Times in 13 Posts
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Quote:
Originally Posted by Christ
Do I have to support my statements with logic?
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No, besides I cant argue with writing down a less-good FE than it was  |
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08-08-2009, 10:30 PM
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#10 (permalink)
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Moderate your Moderation.
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It'll show better mileage... more distance on the same fuel.
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