80 seriers fuel consumption

Submitted: Friday, Aug 16, 2002 at 00:00
ThreadID: 1734 Views:1207 Replies:6 FollowUps:6
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Can any one tell me what is the best speed highway for fuel consumption in an 80 series std man deisel. In the city I get 11.4lt/100km (25mpg) but that doesnt get better on the hwy doing 100-120kph. I thought I would get aprox 30mpg (? l/100kms) in hwy cycle. On a recent trip to shark bay 2300 kms (500kms in 4wd) I averaged 20 Mpg.
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Reply By: coops - Friday, Aug 16, 2002 at 00:00

Friday, Aug 16, 2002 at 00:00
anything over 120 km/h will kill your fuel consumption. I am averaging 15.5 litres/100 km over last 2.5 years (Pilbara based, air-con on 24/7) and my figures are better around town than open road (heavier loads, higher speeds, towing, off road etc).
AnswerID: 5761

Reply By: Bob - Friday, Aug 16, 2002 at 00:00

Friday, Aug 16, 2002 at 00:00
Kevin around 80-90 will give you your best figures. But I suggest you experiment for yourself - the optimum speed is often a compromise between consumption and travel time. Vehicles and conditions vary so much too!
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Reply By: Dougie - Friday, Aug 16, 2002 at 00:00

Friday, Aug 16, 2002 at 00:00
Hi Kevin,
Haven'tbroken down the figures but when travelling from ||Alice Springs to Tassie last year averaged approx 1100kms per filling of both sub & main tanks at 100kmph. Previous trip from Alice to Kakadu at 130-140kph only averaged 800kph. Obviously air con on and no 4x4. I am told a snorkel helps a little bit but don't have one fitted yet.
Hope this helps
Dougie
AnswerID: 5765

Reply By: Derek - Friday, Aug 16, 2002 at 00:00

Friday, Aug 16, 2002 at 00:00
Kevin, I've got the same car as you and recently did a trip from Brisbane to Rockhampton and back again with 2 stops each way. My car has extractors and a 'Finer Filter' air filter. The car was fully loaded and towing a 16ft camper van and returned 25 mpg, which I was quite happy with. My mate was following (similarly loaded) in a 12 month old Turbo 4.2 GU Nissan and got the same mileage. Derek.
AnswerID: 5779

Follow Up By: Bat - Sunday, Aug 18, 2002 at 00:00

Sunday, Aug 18, 2002 at 00:00
There are three things you should not asked people how many miles that get to the gallon ,how much they weight ,and how much they drink, they never tell you the truth.
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Follow Up By: Bat - Sunday, Aug 18, 2002 at 00:00

Sunday, Aug 18, 2002 at 00:00
There are three things you should not asked people how many miles that get to the gallon ,how much they weight ,and how much they drink, they never tell you the truth.
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Follow Up By: Derek - Sunday, Aug 18, 2002 at 00:00

Sunday, Aug 18, 2002 at 00:00
Dear Bat. Despite your total inability to construct a grammatically correct sentence and therefore reflecting your apparent lack of formal education, your sarcastic jibe did not go un-noticed. I stand by the above quoted figures. Could it be you are a member of the petrol guzzling Nissan/Landcruiser fraternity who simply can't comprehend the fact that diesels go further on a litre of fuel!
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Follow Up By: Fred - Monday, Aug 19, 2002 at 00:00

Monday, Aug 19, 2002 at 00:00
Derek, Even though he can't spell or use correct grammar and is a sarcastic little person, Bat does have a point. People are so often vague, inaccurate and unscientific when it comes to fuel useage. One of the replies for example refers to 1100km between fills ..... but at what point did he fill? Were his tanks bone dry? Or maybe there was one litre left .... maybe there were 5 litres left .... or maybe 25!!! I wish he'd told us how much he used and how many kms he travelled! My vehicle has two tanks totalling 159l. When I fill at about 1100km they rarely take more than 130l. Therefore to say I get 1100km from two tanks is quite misleading. I always work on the amount of fuel I put into the tanks when calculating l/100km.
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Follow Up By: Bob- Monday, Aug 19, 2002 at 00:00

Monday, Aug 19, 2002 at 00:00
And what's more Fred, his 1100km are, to use his own words, an "approximate average". Dougie that's very vague and tells me very little!! But good on you for trying!
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Follow Up By: Derek - Monday, Aug 19, 2002 at 00:00

Monday, Aug 19, 2002 at 00:00
Fred. Point taken. And thank you for your politeness. I may have been a little hasty in my original posting. I based my figures on the fact that I went to Rocky and back without refueling and that according to my owner's manual my fuel tanks are 50 litres and 95 litres (you may be able to shed more light on this). My brother in law put roughly the same amount of fuel into his Nissan over the trip and he also recorded a figure in the vicinity of 25mpg using a 'gasculator'. In hind sight I should have ignored Bat's comment, as my reaction was counter productive to the purpose of this forum and for that I apologise. Derek.
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Reply By: StephenF - Saturday, Aug 17, 2002 at 00:00

Saturday, Aug 17, 2002 at 00:00
My Peugeot non-turbo indirect-injection diesel car has always given better fuel consumption around town than on a trip (42mpg vs. 32mpg). I had always assumed that diesels prefer low revs and were out of their element at highway speeds unless geared appropriately (which mine isn't).
AnswerID: 5786

Reply By: Gray - Sunday, Aug 18, 2002 at 00:00

Sunday, Aug 18, 2002 at 00:00
On travelling around 250 000km in two 80,s one part time & one full time 4x4. The more k's on the clock the better. The difference between them is sod all. Town v country 1mpg, part time v full time 1mpg.
I constantly get 1200km's between fills town or country, and weighing in at 2.8 tonne. For best in country is around 100 km/h. anything higher i've found used more.
AnswerID: 5808

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