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GoSee figures show weight, driver and speed key factors in fuel efficiency

July 28, 2009
GoSee figures show weight, driver and speed key factors in fuel efficiency

GoSee evaluation with four diverse light trucks in the same conditions shows weight, driver technique, and speed are three major factors in fuel efficiency particularly in working vehicles.

GoSee now has figures on the four diverse mounts being used by the Beanie Bunch over thousands of kilometres. The numbers reflect the reality of heavily loaded diesels used over up to 3,694 kilometres.

No surprises the lightest, the GoSee Pam and Alan Holden RA Rodeo has the most efficient fuel use figures in highway running. It is fitted with a DPChip which has made a significant difference to its performance overall.

The DPChip comes from Berrima Diesel Service, NSW. Each DPChip is individually programmed to get the best from the vehicle it goes into.

The DPChip is claimed to power up the Rodeo to 116kw with 350Nm. Generally the engine profile is smoother performance across a broader range than standard.

In addition to the Rodeo GoSee has fitted DPChip to our other two Electronically Fuel Injected (EFI) diesel workhorses, the mighty Toyota Sahara Turbo Diesel and the Captiva LX Sports Utility Vehicle (SUV).

The Captiva shows significant improvement towing the GoSee Discovery pop-top caravan.

The Holden Rodeo is a 2006 LX Turbo Diesel 5-speed manual twin cab utility.

It uses a 3.0 litre, four-cylinder turbo diesel inter-cooled engine.

Its unladen mass is 1850kg.

Loaded for the road it tips the weigh-bridge at 2540kg.

It is 1260kg lighter then the heaviest vehicle in the Beanie Bunch foursome the Landrover Defender of Bert and Shirl which is 3800kg.

After 3694km the Holden Rodeo manual diesel light truck returned 10.99 litres per 100km (25.71mpg) in mostly highway running.

The Rodeo has a 76 litre tank. Eight fuel stops were made to put in 405.9 litres.

The 5-speed manual was driven at speeds around 90 to 95kmh on the run to Wiluna, Western Australia from the Geelong Victoria suburb of Belmont via South Australia.

The 405.9 litres of diesel used cost $544.15.

Diesel fuel costs across the four vehicles were between $1.34 a litre to $1.38.

The 2000 Toyota HiLux 4x4 Dual Cab 3 litre manual diesel with canopy was the next most efficient vehicle in the long run to Western Australia.

It tips the weigh-bridge at 2590kg loaded for the road with Geoff and Sue from Nar Nar Goon Victoria.

The HiLux took on 347.7 litres in eight fills to cover 2,794km. It used 12.44 litres (22.7mpg) per 100km. The diesel cost $478.19 at $1.38 a litre.

The HiLux produces 192Nm at 2400rpm.

The 2004 manual 5-speed Landrover Defender 130 2.5 litre 5 cylinder Turbo Diesel Twin Cab with tray of Bert and Shirl from Warragul, Victoria is the heaviest of the four Beanie Bunch mounts at 3800kg loaded for the road.

Given its high loaded weight over 3,587km it returned a creditable 12.55litre per 100km. (22.51mpg) at a cost $622.83 using 451.3 litres in 10 visits to diesel fuel pumps.

2000 Toyota HiLux
2000 Toyota HiLux

Landrover specs the Defender 130 at 90kw and 300Nm. These numbers are typical of a motor designed to pull hard and long. Australia's love affair with Toyota Landcruisers for towing is built on this heavy approach to hard work.

For example the 1985 truck-like HJ60 series in standard form produced only an embarassing 72kW at 3500rpm.

Max torque, however, 229Nm (pulling power) comes in at a relaxed 1800rpm. It is a tractor. Nissan followed a similar design line in early models.

Next in the Beanie Bunch fuel efficiency evaluation was the new 2009 Toyota HiLux SR5 Double Cab 4 cylinder 3 litre EDI Turbo diesel 4 speed auto of Phil and Barbara from Swan Hill, Victoria.

Unladen the new HiLux weighs 1900kg.

Loaded for the road it tips the scales at 3500kg. This is a lot of weight for a vehicle of its type.

The long-range fuel tank took five fills totalling 401.2 litres to cover 3,020km. It returned 13.29 litres per 100 kilometres (21.26mpg) at a cost of $544.38.

Landrover Defender
Landrover Defender

Phil and Barbara found the cheapest fuel at $1.34 a litre.

Toyota claims 126Kw and 343Nm for the auto. The new HilLux has a long-range fuel tank fitted.

After a year of evaluation of the product with the company Captiva LX auto SUV diesel and now the Holden RA Rodeo, GoSee believes that there are practical benefits in DPChip diesel power for Electronically Fuel Injected (EFI) diesel engines.

DPChip Senior Techician Andrew Leimroth told GoSee during an evaluation trip to DPChip at Berrima, NSW, in June that many diesel owners did not know the real weight of their vehicles.

Over weight vehicles struggle to produce performance and many of the vehicles which DPChip sees are much heavier than their standard trim specifications, he said.

Power and fuel efficiency suffers and spin-off downsides include potential suspension, handling and braking problems, plus the possibility of excessive tyre wear.

2009 Toyota HiLux
2009 Toyota HiLux

Scott Leimroth Marketing Manager of DPChip said that - The DPChip really is a performance device and we would not recommend it purely for fuel savings as users may be disappointed, however we do find most people get some sort of fuel saving.

Berrima (NSW) Diesel Service, the company behind DPChip has been working exclusively on diesels since 1956. The DPChip is available for all EFI diesel 4wd's and independently alters both fuel and fuel timing to optimise the entire engine map.

More efficient use of the fuel system and correct fuel timing are important factors not only for achieving the best economy but to control peak exhaust gas temperatures for optimum engine durability.

DP Chip Diesel Power (Auto Performance)

Tyacona, Old Hume Highway

Berrima NSW 2577

Phone: 02 4877 1022

Fax: 02 4877 1239


Editors note: Here are features from the free GoSee Information Articles library which relate to fuel efficiency.

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ARB Awning on Toyota HiLux
ARB Awning on Toyota HiLux
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