Fuel Consumtion Figures ???

Submitted: Monday, Jun 05, 2006 at 14:27

ThreadID: 34636 Views:1441 Replies:2 FollowUps:3

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Member - Nick (Kununurra)

Im usually pretty good with figures until I get them in my head,then my head starts to hurt.Now I have bigger tyres on,speedo is 5km/hr out.Odometer and trip meters will also be out but which way.Will they show more kays done or less??I started figureing it out but my head started hurting and I stopped.(no nothing to do with a certain scar,Im a sandgroper now).
See you all,off fishen now.sun is shinen, weather is beautiful,birds are singen........

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Reply By: Snowy 3.0iTD - Monday, Jun 05, 2006 at 14:45

Monday, Jun 05, 2006 at 14:45

Nick

The odometer will read 100kms when in fact you will have done 105kms. So to calculate the L/100km you take : number of litres / odometer reading x 0.0105.

Snowy

AnswerID: 176825

Follow Up By: ellmcg - Monday, Jun 05, 2006 at 16:32

Monday, Jun 05, 2006 at 16:32

Are you sure about that calculation? Isn't it assuming that he's doing 100km/hr when his speedo is 5km out?

I think we need to know if the speedo is 5km out consistently, or if it is for example 5km/hr out at 50km/hr, and 10km/hr out at 100km/hr...

FollowupID: 432884

Follow Up By: Snowy 3.0iTD - Monday, Jun 05, 2006 at 17:11

Monday, Jun 05, 2006 at 17:11

5% is five percent. 100% plus 5% is 105%, it makes no difference whether you are talking km's, km/h or mph

In the case of km I used 100km for simplicity:

100 x 5% equals 5 on top of your original 100 is 105 ie 100 x 1.05 = 105

For 50km/h x 1.05 = 52.5km/h

Do you see? I myself went from 265/75R16 to 285/75R16 on my Patrol so I have done this calc many times.

Regards

Snowy

FollowupID: 432893

Follow Up By: Snowy 3.0iTD - Monday, Jun 05, 2006 at 17:14

Monday, Jun 05, 2006 at 17:14

Nick

I also forgot to mention that in my own experience with this exact same size increase that the difference in mine was 4%. And to really spin you out, you could also try and allow for the the fact that as your tyres wear, this percentage will decrease, but in this case 4-5% is close enough.

Snowy

FollowupID: 432894