Fuel Efficiency

  • Ewart and Vivian Halford
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26 Oct 2016 18:31 #1 by Ewart and Vivian Halford
Ewart and Vivian Halford created the topic: Fuel Efficiency
My fuel figures for my last trip, mostly gravel, had to control the right foot, tried to keep the fuel boost below 10 psi,
255/100/16 tyres.
Hope you can understand my spread sheet. We lost some In between kilometreage.




Cheers

Ewart oka 365
0428911147
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28 Oct 2016 08:23 - 28 Oct 2016 08:28 #2 by Peter_n_Margaret
Peter_n_Margaret replied the topic: Fuel Efficiency
The fuel consumption of #196 since I bought it in 2003 (~180,000km) is a tad over 19L/100km. It weighs in at about 6T and is wider & taller than most.
We just did about 3,000km in company with a 200 series Landcruiser towing a 23ft off road caravan that included BH, Innamincka, Marree, Oodnadatta, Old Andado to Alice Springs, mostly at about 65kph (to suit the Cruiser).
The Landcruiser used 26.5L/100km, the OKA used 16.9L/100km, same roads, same speeds.
Once on the bitumen at 90kph, Alice to Port Augusta with a head wind the OKA went up to about 20.3L/100km.

Cheers,
Peter

Cheers, Peter.
OKA196 tinyurl.com/OKA196xtMotorhome
Mob.0428171214
Last Edit: 28 Oct 2016 08:28 by Peter_n_Margaret.

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28 Oct 2016 15:42 #3 by Dean and Kaye Howells
Dean and Kaye Howells replied the topic: Fuel Efficiency
By contrast #413 is probably at the other end of the spectrum if compared to Peter_n_Margaret's. It has a fairly low profile, bus body with no roof rack and a touring mass of approx. 4-5 tonne (guesstimate) and riding on 305/70R19.5 highway tyres it gives IMO fairly good fuel consumption.

Typical highway or dirt road cruising at 90-95 km/h will return 15-17 l/100Km, 95-100 km/h will return 17-19 l/100 km/h and aggressively pushing 100km/h will take it out to 19-20 l/100km. On flat road with no wind and my tongue held in the right spot #413 'loves' sitting on 105 kph, the trick is holding it. With 285's I think this would be easier to achieve, but fuel consumption suffers.

The best we've achieved was 13.6 l/100 km over 800 km or so loafing along the Bourke Development Road at around 75 km/h or 1300rpm or so in 5th gear. An amazing result really. The worst was battling through dense scrub, soft sand and dunes in the Great Sandy Desert for a jaw dropping 2 Km to the litre or 50 l/100km. Fortunately this was only for a relatively short distance but it certainly had me 're assessing' fuel requirements.

By all accounts fuel consumption from 'the dark side' can be better than the standard Perkins but at the cost of 'no class' hardly a good reason for an engine transplant :}

Deano :)

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28 Oct 2016 16:45 #4 by 210greg
210greg replied the topic: Fuel Efficiency
What more can one say Deano just NO CLASS
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28 Oct 2016 19:04 #5 by Joseph Baz
Joseph Baz replied the topic: Fuel Efficiency
Deanno,just out of curiosity is your pump on the std fuel settings?
Cheers,Joe

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29 Oct 2016 12:15 #6 by Dean and Kaye Howells
Dean and Kaye Howells replied the topic: Fuel Efficiency
Hi Joe, The injector pump on #413 is stock standard plus 1/8th turn on the fuel screw. I had it rebuilt by a Bosch specialist a couple of years ago to these specs and can't fault it. I reckon I'm a fairly light footed driver and IMO regularly changing air filters, regardless of how they 'look' with modified air cleaner internals all helps. Replacing the factory muffler with a straight through unit made a significant difference to air flow and I reckon fuel consumption.

Deano :)
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29 Oct 2016 16:20 #7 by OKA 138
OKA 138 replied the topic: Fuel Efficiency
Joe
,Deano blitzed us on both fuel consumption and performance i.m not sure he would have been that much lighter than us but definitely lighter than David and janet OKa 148,so his pump setting is a good all-round unit.
I haven't had my pump done but I recently did a rebuild on my Nissan 4wd ute which has a VE pump and they told me that the settings they use now is about 10% more pressure and that improved the Nissan out of sight with both power and economy.

Cheers Dave
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