[atari4x4]

Right, we have a Tyre Dribble Thread & this is the spot for all your Fuel Economy Dribble such as my Suzuki is only doing XXXkms to a tank, is that normal.

Please state how many litres used & how many kms traveled or just use the calculator link to work out how many litres per 100kms you're doing. http://www.accommodationz.co.nz/economycalculator.html

What size tyres & gearing, roof racks, extra weight etc also play a part in economy + the fact everyone has a different driving style and that each persons location differs meaning that figures are not directly comparable but can be used as a guide. The more information supplied the better the replies will be, eg are you accounting for the larger rolling diameter of bigger tyres?

I'd like to keep this just for fuel mileage questions as there have been quite a few threads over the years & random question leaving specific issues & problem solving such as this one viewtopic.php?f=5&t=41250 to individual threads.


Ok discuss:

[SierraDan]

1989 SE416 SWB Vitara Carby Manual.
No mods or add-ons other than 29" HT/AT tyres.

10.1L/100km (tyre size accounted for)

[atari4x4]

1997 SV620 LWB V6 Auto
31" MT's, 5.12's, 3" spring lift + 2" bodylift

14.1/100kms. (12 month average tyre size accounted for)

over those 12 months, my fuel usage has ranged from 13.6l/100kms to 33.8l/100kms & averaged the figure above, it changes drastically depending on what i'm doing... the 33.8l/100kms was thrashing in the dunes loaded up towing my trailer, pretty much a worst case scenario.

[tassie jeeper]

95 SV620 LWB 2.0V6 Manual

high flow K&N style filter, 2" muffler no other mods

10L/100kms (last tank of juice before mods went on)

this tank consisted of a fully loaded trip through hilly bush to go camping for 2 days,
rallying through gravel rd's in 4WD
racing across town at 6,000rpm (this chews the juice)
and general driving.
and this was using premium 95-96 octane

i have just fitted 29.5" tyres and a 2.5" lift (still with stock gearing and speedo) i will moniter my fuel usage and post up an average after say 10 tanks of juice

[tomtheshooter]

Sierra G13BA
2in lift
Roof racks
235/75r15 tires
Standard gearing.
95 octane

Getting around 9L per 100k highway driving, 4th gear 3500rpm cruising at 90.
That goes up to 11L per 100k in low range stuff.

Not bad for car with 280,000ks on the clock.

[reeceh]

I have a 91 sierra hardtop. With a great condition g16b which is a jap import model. I get almost 300kms if I drive conservatively. I always use shell v power as I find the engine runs a dickload better plus I get better economy. I have no gearing and 30x9.5 maxxis bighorns. Plus my rear space in the hardtop is chocked full of tools. I filled up on near empty and its about 33litres. I have a surge tank with twin pump setup.

[atari4x4]

is that 300kms taking into account of the lager tyres.

not corrected it works out to be 9l/100kms

[TheOtherLeft]

2002 GV 3 dr J20A
5.12 diffs but back to original 27" H/T tyres
slim roof racks

About 10l/100km around Sydney urb.an

[reeceh]

I put the worksite into google maps and then timed the distance by 2 then that by 5 for the working week. That alone is 230kms. Then on the weekend I'd roughly do about 50-60kms in it.

[atari4x4]

cool so actual distance, that's pretty good.

[reeceh]

I'm a plus 1 for v power. I use to fill up at freedom fuels and the car wouldn't idle the best and lacked low down oomph. There's a noticeable difference in running/idling and also a noticeable increase in low down acceleration.

[SierraDan]

I get BP Ultimate if I can. Dont really notice anything other than better idling and it makes me feel like im looking after the car a bit more by using premium haha.

[SuziBlu]

Using 98 will be better for your power train, but unless you tune it for the slower burning fuel, you will not see a big gain, tune it, much better.

[sideways]

1981 1l Sierra
30" KM2s
Wannabee exocage thingy.
Seemed to have bigger carby jets, had a mildly blown head gasket.

16l/100kms on highways.

1980 LJ80v
25" H/T tyres
Had roof racks but didn't seem to make a difference when I took them off.
Really worn out/neglected motor.

10-11/100 for general country driving.

[reeceh]

There's not a big gain, but for the extra 20c a litre it's well worth it!

[MacDaddy]

Can someone show a simple/easy way to work out, litres per 100kms ?

[atari4x4]

first post has a link to a calculator, pump in your kms traveled & fuel usage & it will give you the answer.

[SuziBlu]

Its really simple, your kilometers, divided by the fuel used.

300kilometers
28liters

= 300/28 =10.71kilometers per liter

If you do it the other way round, 28 liters
300 kilometers

=28/300*100 = 9.33333 liters per 100k

[murph51]

may I ask the difference in fuel economy guys have gotten using the same car but different fuels? 91,95,98 etc?

[SuziBlu]

my lil airport car, dead stock JLX vitara, except for bigger coil and tuned for 98.

when I got it, was on 91, couldn't get less than 10, mostly about 10.5 liters per hundred, now, on 98, (about 2 years worth) I do my calcs on 8 liters per hundred

IMO a lot of diff, 98 does not cost 22% more, cheaper to use the better fuel.

[atari4x4]

since owning the blagon i think i've only put 1/2 a tank of regular unleaded (91) mixed with 98 through it so haven't really got a good test base.

as SierraDan said earlier i feel better knowing i'm putting the good stuff in it seeing i do give it a fair bit of curry 99% of the time.

[want33s]

SuziBlu wrote:

my lil airport car, dead stock JLX vitara, except for bigger coil and tuned for 98.

when I got it, was on 91, couldn't get less than 10, mostly about 10.5 liters per hundred, now, on 98, (about 2 years worth) I do my calcs on 8 liters per hundred

IMO a lot of diff, 98 does not cost 22% more, cheaper to use the better fuel.

Did you trip over a calculator?

[tassie jeeper]

SuziBlu wrote:

IMO a lot of diff, 98 does not cost 22% more, cheaper to use the better fuel.

i laugh at all the people whom only buy their fuel at woolies and coles for the 4c's a liter they save on fuel, 100/4= 25 which means u need to purchase 25L to save $1.00 so when u fill up your whole tank most people save between $1.00-$3.00 WOO!! massive savings!!

[joel]

SuziBlu wrote:

Using 98 will be better for your power train, but unless you tune it for the slower burning fuel, you will not see a big gain, tune it, much better.

explain one of these "power trains"to me?
is it electric? or steam?
fuel is fuel, the only difference is burn rate, burn speed, how clean it is, cetane rating and cost.

[SuziBlu]

want33s wrote:

SuziBlu wrote:

my lil airport car, dead stock JLX vitara, except for bigger coil and tuned for 98.

when I got it, was on 91, couldn't get less than 10, mostly about 10.5 liters per hundred, now, on 98, (about 2 years worth) I do my calcs on 8 liters per hundred

IMO a lot of diff, 98 does not cost 22% more, cheaper to use the better fuel.

Did you trip over a calculator?

that was a quick mental calc

23.81%

lol happy.

[sideways]

Ever since I put premium in my scooter it's been a bastard to start.

[youda]

mods
235/75's
base timing 16deg
new plugs
new leads
new coil pack
98 oct fuel
camping gear about 40kg and two fuel jerries
according to fuel calc i got 8.95ltrs to the hundred

[MacDaddy]

joel wrote:

SuziBlu wrote:

Using 98 will be better for your power train, but unless you tune it for the slower burning fuel, you will not see a big gain, tune it, much better.

explain one of these "power trains"to me?
is it electric? or steam?
fuel is fuel, the only difference is burn rate, burn speed, how clean it is, cetane rating and cost.

This is one big reason i switched to 95+, 91 contains much more Sulphur, and i have seen what Sulphur does inside a fire tube boiler, that i had to clean out, and i definitely dont want that crap in my engine...

[SuziBlu]

joel wrote:

SuziBlu wrote:

Using 98 will be better for your power train, but unless you tune it for the slower burning fuel, you will not see a big gain, tune it, much better.

explain one of these "power trains"to me?
is it electric? or steam?
fuel is fuel, the only difference is burn rate, burn speed, how clean it is, cetane rating and cost.

oops, didnt see this before, it was mean, as in engine, that is the inside, the whole power train. Smoother fuel, close to zero chance of pinging, so, far better for interbnals, or, power train.


I thought cetane was a diesel thing, not petrol ?

[MacDaddy]

SuziBlu wrote:

Its really simple, your kilometers, divided by the fuel used.

300kilometers
28liters

= 300/28 =10.71kilometers per liter

If you do it the other way round, 28 liters
300 kilometers

=28/300*100 = 9.33333 liters per 100k

Ahhh ok, thanks for that...