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Fuel Consumption...

Bourbon Boy
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Bourbon Boy Community Regular

Bourbon Boy

Posted
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You might think it's a bit over the top but this for me has been an 6 month study... Nerd :P

I have a V35 2004 model Odometre reading = Under 60000km...

- 76 Ltr fuel tank as should be everyones V35.

Below are figures wearing the following shoes: Khumo Ecsta SPT REAR:275/35/R19 - Front: 245/35/R19

TANK: FULL

Drive - Track - Consumption: N/A

Drive - In a real Hurry - Consumption: 15 Litres per 100km

Drive - Normal - Consumption: 13-14 Litres\100km (I normally drive hard )

Drive - Cruising - Consumption: 12-13 Litres\100km

TANK: HALF

Drive - Track - Consumption: N/A

Drive - In a real Hurry - Consumption: 14-15 Litres per 100km

Drive - Normal - Consumption: 13 Litres\100km

Drive - Cruising - Consumption: 12 Litres\100km

Below are figures wearing the following shoes: Maxis VIP Radial MA-V1 REAR:235/40/R18 - Front: 235/40/R18

TANK: FULL

Drive - Track - Consumption: N/A

Drive - In a real Hurry - Consumption: 13-14 Litres per 100km

Drive - Normal - Consumption: 12-13 Litres\100km

Drive - Cruising - Consumption: 11 Litres\100km

TANK: HALF

Drive - Track - Consumption: N/A

Drive - In a real Hurry - Consumption: 12-13 Litres per 100km

Drive - Normal - Consumption: 11 Litres\100km

Drive - Cruising - Consumption: 10 Litres\100km

Sorry to be Captian Obvious here: But as you can see weight, tyres (in this case size not brand) and driving style makes a big difference in fuel consumption.

I don't expect anyones answers as detailed as these, but Im just curious to see what other peoples figures are for their V35... or even if anyone else cares. :)

Cheers!

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V28VX37 Veteran

V28VX37

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Perhaps I'm missing something here but what's the idea behind the 'Tank: Full' and 'Tank: Half' separation?

I'm used to measuring fuel consumption by filling it up to full tank every time (noting litres filled) and then subtracting current odo reading from previous refill's for exact kms....

fcruz3r Experienced

fcruz3r

Posted
Posted

there's almost a 4.5% circumference difference between a 275/35/19 and a 235/40/18 ...so the 18" tyre will cause your milage to show higher than what you actually travelled. This is what gives the perception of better fuel economy on the smaller wheel.

as for consumption figures, this has been discussed in great detail before. do a search on past threads.

Bourbon Boy Community Regular

Bourbon Boy

Posted
  • Author
Posted
Perhaps I'm missing something here but what's the idea behind the 'Tank: Full' and 'Tank: Half' separation?

I'm used to measuring fuel consumption by filling it up to full tank every time (noting litres filled) and then subtracting current odo reading from previous refill's for exact kms....

The purpose was since it's such a big tank (76 Litres) it will hold a lot of weight when filled full. So half filling up helps with weight reduction which can help with fuel consumption.

there's almost a 4.5% circumference difference between a 275/35/19 and a 235/40/18 ...so the 18" tyre will cause your milage to show higher than what you actually travelled. This is what gives the perception of better fuel economy on the smaller wheel.

as for consumption figures, this has been discussed in great detail before. do a search on past threads.

Good Point there... I never actually considered that. You've wrecked it for me! :D LOL

76 litres?

is yours series two?

Thats 76 litres dry... check out the attachment.

post-74159-1278028215_thumb.jpg

fcruz3r Experienced

fcruz3r

Posted
Posted
The purpose was since it's such a big tank (76 Litres) it will hold a lot of weight when filled full. So half filling up helps with weight reduction which can help with fuel consumption.

Good Point there... I never actually considered that. You've wrecked it for me! :D LOL

Thats 76 litres dry... check out the attachment.

there's other advantages of the smaller wheel...assuming smaller = lighter...then there's less rolling resistance and will give u slightly better milage.

but with how low our cars are...i'd stick with the 19"...plus it just looks better

Bourbon Boy Community Regular

Bourbon Boy

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Yeah True... I only put the stockies 18's back on so I can save my good tyres on the 19's for the track day we're organising... We're looking for racers if you're interested? Check it out: http://www.skylinesaustralia.com/forums/Pr...-3-t324330.html

And speaking of rim weight:

The Stock 18" Rims with the tyres I specified above weigh 22kg's each. set=88kg

Where as the 19" Rims set up I also mentioned above weigh 24.5kg's each. set=98kg

When I wear out the tyres on the 18's I'll put semi slicks on them and use them as dedicated track tyres.

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