petrol versus diesel

Garage talk. Anything from mounting a winch to water proofing the electrics.

petrol versus turbo diesel

3 litre petrol
15
28%
3 litre turbo diesel
39
72%
 
Total votes: 54

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mercutio
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petrol versus diesel

Post by mercutio »

okay guys here is the question the g is a little low on power at the moment (as everyone who has seen it moving can testify too :D :D }
and i had planned on giving it an engine swap as a result i bought a turbo diesel engine that needs a little bit of work i.e it has a bent valve

since then though the price of diesel has gone up a bit and and petrol is becoming an option and then i got offered a 3 litre petrol motor a mercedes of course for $700 that will bolt in with little hassle

what do you guys reckon fix up the old diesel or sell the old diesel and buy the petrol motor :D :D

come on state your reasons for your vote too
my 4wd is not a truck

old mercedes never die but sometimes they do need some love

older cars are good,mercedes are better,older mercedes are the best
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MAHINDRACJ4A
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Post by MAHINDRACJ4A »

price of petrol has gone up too :evil: :evil: :evil: :x :x :!:
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DaveM
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Post by DaveM »

What type of driving? Whats the fuel consuption like on each? Which is more reliable?
I have always been a fan of diesels, but love the power of petrols.

If I ever go down the petrol road, it will have to be dual fuel for me to be able to afford to run it. I usually spend an everage of $350/month on diesel :cry:
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Post by MAHINDRACJ4A »

we spend about $840 in petrol every month in our subaru
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Post by DaveM »

$200 week :shock: You must be overpaid :lol:
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monstr
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Post by monstr »

Go the diesel, For Torque and low down grunt you wont beat it ,Lets be honest the vehicle its going into is not designed as a high speed machine keep the air above water level and far less hassles than petrol..Just my thoughts...
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Jerry
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Post by Jerry »

Depends on how you drive it, if its a daily driver go with the diesel, if its a weekend toy backup vehicle etc then go petrol
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KiwiBacon
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Post by KiwiBacon »

Reasons to go diesel:
Low end torque
Mid range torque
Fuel economy
Range
No spark plugs
Low fire risk
Fuel does not evaporate easily
Engine longevity

Reasons to go petrol:
Bigger rev range
More top end power
Oil well in back yard
Too much money.

:D
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mercutio
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Post by mercutio »

at the moment it is a daily driver
another reason i am thinking of the change is it does consume alot of diesel at the moment
but then that could just be the old motor in it currently
my 4wd is not a truck

old mercedes never die but sometimes they do need some love

older cars are good,mercedes are better,older mercedes are the best
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Jerry
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Post by Jerry »

cough .....350 Chev :lol:
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TJ
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Post by TJ »

Have you been stuck in traffic behind a diesel burner? Enough said, go petrol.

As for the false pretence that diesel is more economical, well better do the complete comparison from cradel-to-grave of the engines and not just the pump price. The pump price for diesel does not include the road user charges to start with. Then there is the higher expense of fixing should something go wrong with the engine, so on and so forth.

My 4.0l I6 petrol engine has lots of low end torque (not all petrol engines are low on low end torque). The only thing missing in my case is aerodynamics of the body, but then it wouldn't be a Jeep.
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Post by meatc »

go diesel.

I drive a v6 petrol 05 Rodeo for work and man am i glad i dont pay the fuel bill. Average driving gets 17-18L per 100ks. Put a load on or drive it hard and its worse than a V8.

Had a diesel terrano and have just got a diesel courier. Much easier on the pocket at the pump and even with the extra service and road users its cheeper.

Guy I work with is selling his V6 terrano soley due to running costs.
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Post by WACKO »

i can only speak from pajero experience, but, for an offroader, petrol all the way. ive had a diesel and petrol paj and just found the petrol to be sooo much better offroad. picked up quicker, reved harder, more power. but, it drinks the gas somthing cronic. and the diesel i had was a 2.5td. i have been in 3ltr turbo diesel, hiluxs/surfs that go bloody well. as mine is a weekend toy, i wouldnt even think of going diesel, but driving it every day id look for a late model diesel. also, how much work will be involved in getting the diesel mtr in? will it bolt in? im sure the petrol will be cheaper in the short term, maybe even long term.

i say, go petrol and supercharge it!

Sam
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mercutio
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Post by mercutio »

i could put one of these in the g :lol: :lol:

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my 4wd is not a truck

old mercedes never die but sometimes they do need some love

older cars are good,mercedes are better,older mercedes are the best
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mercutio
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Post by mercutio »

Jerry wrote:cough .....350 Chev :lol:

i didn't know mercedes make 350 chevs :lol: :lol:
to be honest i am a big fan of sixes the thought of putting a 3.2 litre 24 valve inline six under the bonnet is rather appealing :lol: :lol:
my 4wd is not a truck

old mercedes never die but sometimes they do need some love

older cars are good,mercedes are better,older mercedes are the best
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Post by KiwiBacon »

TJ wrote:Have you been stuck in traffic behind a diesel burner? Enough said, go petrol.

As for the false pretence that diesel is more economical, well better do the complete comparison from cradel-to-grave of the engines and not just the pump price. The pump price for diesel does not include the road user charges to start with. Then there is the higher expense of fixing should something go wrong with the engine, so on and so forth.

My 4.0l I6 petrol engine has lots of low end torque (not all petrol engines are low on low end torque). The only thing missing in my case is aerodynamics of the body, but then it wouldn't be a Jeep.


False pretense of diesel being more economical. :lol:

Why do you think all the heavy vehicles and machinery worldwide are diesel? Even in countries where the diesel price outstrips petrol?

A couple of examples from my own garage.
Nissan wagon, 1.8L petrol gets 12km/l onroad which works out at 14.6 cents per km at 175c/litre.
Diesel rangerover, 3.9L turbo diesel gets 10km/l onroad which costs 13 c/km for fuel and 3 c/km for RUC. Total 16c/km at 130c/litre.

That makes a 2.3ton fulltime 4wd a whole 1.5 cents per km dearer to run than a japanese econobox.

Petrol rangerover, 6km/l, at 175c/litre = 29c/km. Almost double the cost of running the diesel version. Despite the diesel being heavier.

A new jeep 4L petrol has 315Nm of torque peaking at 4000rpm.
Jeep's 2.8L diesel beats that easily, as does every other diesel around the 3L mark.
The old 4L straight six jep could only do 200Ftlbs, that's 275Nm.
Last edited by KiwiBacon on Tue Jan 08, 2008 8:19 pm, edited 1 time in total.
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Post by DaveM »

Our Prelude is cheaper to run to ChCh than our Safari (GQ), the Safari is on par with a mates 5.7 SS ute, but he gets there quicker.
If the petrol is on LPG, its probably cheaper. My 2.8 Safari costs more to run that mates 4.5(lpg) patrol.

Once the warranty runs out on the new safari, I'll be going petrol/lpg conversion
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Post by krawlr »

yep when diesels break they arnt cheap! but longer life depending on servicing intervals etc

go the 1kz with lpg injection.....works for me
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Post by KiwiBacon »

krawlr wrote:yep when diesels break they arnt cheap! but longer life depending on servicing intervals etc

go the 1kz with lpg injection.....works for me


Be careful with LPG injection on such an engine. The combination of high compression and indirect injection can cause preignition of the LPG.
This isn't good for your engine at all.
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Post by Sadam_Husain »

its just the same old Holden vs Ford or Toyota vs Nissan arguement

Just comes down to what you prefer, how many km's you drive and how much your prepared to spend on fuel.

I'm with wacko.... petrol all the way (but with a few more cylinders) :wink:
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Post by Dace »

I will have to put my vote in for Diesel

I know petrol will give ya more bang per cc but with the oil prices increasing, petrol can only continue to get more expensive

And with Bio-Diesel already spreading through out the US, it will hopefully keep Diesel prices down

And also the fact that providing ya have a snorkel, there are no leads, plugs, distributors and ignition system to get wet and kill the fun
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Post by nstg8a »

just out of curiousity, who pays ruc's the way you should?

as i understand it, you only need ruc's when on the road, so when playing in the mud there is nothing wrong with having a switchable odometer? that way you can save money by not clocking up unneceessery km's....

or run the risk of having it completely disconnected? which i am not suggesting by the way.
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Post by rangimotors »

nstg8a wrote:just out of curiousity, who pays ruc's the way you should?

as i understand it, you only need ruc's when on the road, so when playing in the mud there is nothing wrong with having a switchable odometer? that way you can save money by not clocking up unneceessery km's....

or run the risk of having it completely disconnected? which i am not suggesting by the way.

Just about a new topic don't ya reckon? I think there was a thread on it a while back but no idea where.

my vote went to petrol because i have a company car so its only my weekend toy but as stated everyones situation is different

edit. the other reason my vote is with petrol is im happy to have a good play with a petrol engine and have done many times before, I no next to nothing about diesel engines
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Post by nstg8a »

rangimotors wrote:
nstg8a wrote:just out of curiousity, who pays ruc's the way you should?

as i understand it, you only need ruc's when on the road, so when playing in the mud there is nothing wrong with having a switchable odometer? that way you can save money by not clocking up unneceessery km's....

or run the risk of having it completely disconnected? which i am not suggesting by the way.

Just about a new topic don't ya reckon? I think there was a thread on it a while back but no idea where.

my vote went to petrol because i have a company car so its only my weekend toy but as stated everyones situation is different

edit. the other reason my vote is with petrol is im happy to have a good play with a petrol engine and have done many times before, I no next to nothing about diesel engines


its related to this thread.... :wink:

comes down to the cost of petrol vs diesel....

diesel is a bit cheaper if not having to worry about the rucs
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Post by KiwiBacon »

nstg8a wrote:just out of curiousity, who pays ruc's the way you should?

as i understand it, you only need ruc's when on the road, so when playing in the mud there is nothing wrong with having a switchable odometer? that way you can save money by not clocking up unneceessery km's....

or run the risk of having it completely disconnected? which i am not suggesting by the way.


I believe the way you're supposed to do it involves claiming back a percentage. Not by disconnecting the speedo.
Contractors who run trucks offroad for many km's know what the deal is, but it's about 10 years since I last asked one.

How many km do you really clock up offroad? 1000km costs about $30 so it's not a biggy. But I understand fully the psychological implications of paying too much tax.
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Re: petrol versus diesel

Post by Steve_t647 »

You have to run an odometer on and offroad it is the mile's the car truck 4wd does it is never allowed to be switched if it is used onroad, if you are found to have it switched or able to be dissabled then the police wil come down on you pretty heavily.

The only legal way to get the offroad diesel miles is to keep a log book, we have to do this for work for the two truck's we have, the next time you need miles they do a correction of the number of miles you have done offroad. I also know someone who had their odometer disconnected and had the cambelt let go when the mechanic looked he said why did you drive on the cambelt so long?

You can also be liable when you sell the vehicle if you reference the odometer anywhere when selling if the odo has been knowingly altered and this had happened on many occasion's now and a cash correction has been ordered throught the small claim's courts.

As for Petrol and Diesel I have both they are quite different heavy or towing Diesel all the way, speed the ability to overtake and the top end power when needed Petrol, Daily driving I still go Petrol, just the oil changes and maintanance in a diesel is more than I want
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Re:

Post by TJ »

KiwiBacon wrote:The old 4L straight six jep could only do 200Ftlbs, that's 275Nm.


It was (and still is on TJs) 235 ftlbs (or 319 Nm) @ 3,200 rpm but that would be being picky on my part :)

None of the big rigs are desinged for high speed or stop/start use and that is where a petrol engine comes handy. If you do long haul heavy load trips on a daily basis, yes diesel would make more sense because the engine would not need as frequent servicing. I wonder why they switch big ships to HSD from marine diesel when in port (oh yes, for a quicker enginer response and ease of manouverability).

I am not anti diesel, but it depends on the application.
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Re: Re:

Post by KiwiBacon »

TJ wrote:
KiwiBacon wrote:The old 4L straight six jep could only do 200Ftlbs, that's 275Nm.


It was (and still is on TJs) 235 ftlbs (or 319 Nm) @ 3,200 rpm but that would be being picky on my part :)

None of the big rigs are desinged for high speed or stop/start use and that is where a petrol engine comes handy. If you do long haul heavy load trips on a daily basis, yes diesel would make more sense because the engine would not need as frequent servicing. I wonder why they switch big ships to HSD from marine diesel when in port (oh yes, for a quicker enginer response and ease of manouverability).

I am not anti diesel, but it depends on the application.


What is this HSD you're talking about in ships and what is this extra maintenance you're referring to with a diesel?
Mine gets oil and filter changes at 10,000km. My petrol car also gets oil changes at 10,000km (up to 18,000km in the manual, but I know they did nothing in japan) and also requires me to pull the spark plugs to check their condition.

Have you driven many diesels? They don't normally have a problem with engine response or manouverability.
Unless you're talking about the old 2.5L non turbo mazda at work, that one's constipated.

About the only situation I'd buy a petrol car for again would be very cold conditions. Petrol doesn't turn into candles in your tank and the extra waste engine heat heats the cabin up quicker. My petrol japanese car will be replaced with a diesel when the time comes.
The economy, range, torque and ease of maintenance are all winners for me.
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Re: Re:

Post by TJ »

KiwiBacon wrote:What is this HSD you're talking about in ships and what is this extra maintenance you're referring to with a diesel?
Mine gets oil and filter changes at 10,000km. My petrol car also gets oil changes at 10,000km (up to 18,000km in the manual, but I know they did nothing in japan) and also requires me to pull the spark plugs to check their condition.

Have you driven many diesels? They don't normally have a problem with engine response or manouverability.
Unless you're talking about the old 2.5L non turbo mazda at work, that one's constipated.

About the only situation I'd buy a petrol car for again would be very cold conditions. Petrol doesn't turn into candles in your tank and the extra waste engine heat heats the cabin up quicker. My petrol japanese car will be replaced with a diesel when the time comes.
The economy, range, torque and ease of maintenance are all winners for me.


Lets just agree to disagree, because I am not buying a diesel again (have had enough with non-commercial application diesel engines, i.e. ones used in passenger cars and SUVs). I am biased towards petrol and you are towards diesel, best part of living in a free and democratic society - choices and the ability to chose what you like...

As for ship applications, ccean-going ships normally take residual fuel oil bunkers when they are steaming out in the big open sea. Its not the cleanest (usually high in sulphur) or easiest of the fuels to burn. But these ships also take distillate fuels for use in auxiliary engines and use in port as the main engines can respond more "quickly" with this grade of fuel when the ship is manouvaring to dock. There are many names for this distillate around the world (including HSD = high speed diesel). Fuel choice mainly depends on the ship owners' economics, engine type and application. I am stricly talking about commercial use marine bunkers here (recreational use diesel engines on boats and fun crafts are a completely different beast and application).

This is getting way off topic here. So lets just leave this discussion for another time.

Back to the original poster, have you picked your choice yet?
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Re: petrol versus diesel

Post by mercutio »

still have not decided yet but i am quite keen on having alot more power
i got a price on a 24 valve 3 litre 6 of $850 but i forgot to ask if that includes loom and ecu i will also have to modify the fuel lines to set up a high pressure pump for the fuel injection if i go that way but even then i thought that was a nice price for the motor it is nz new with 140,000ks on it
my 4wd is not a truck

old mercedes never die but sometimes they do need some love

older cars are good,mercedes are better,older mercedes are the best
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