Petrol vs Diesel: A 10 year urban running cost comparison

[Whitey Shockie Maker of the Month Award Find all posts View Profile Close Whitey]

Except, I don't use a scanguage. Use a pen and paper. I don't do it 'one day', I do it several times on each of our trips. Fuel pricing for us is generally relatively high because the vehicle spends most of its km's where it was actually designed for.

Just because I haven't got 10 years of records, doesn't mean my numbers are wrong. They are just different to Rob's. It's great to have a load of data from one vehicle, but as it comes from a single prado with the same driver then it is not the bible. There is more to the fuel consumption of a vehicle than the date of manufacture and the fuel type.

We'd need data from a whole bunch of petrol and diesel prados if we wanted a fair comparison.

Hey,

Yep, fair call, I'm definitely not saying the model is the bible, but at the very least it's the first historical model I've seen that has quantitative output from real world fuel and economy figures.

I also used to do it the old pen and paper way before I got lazy and bought a scanguage.

It's no problem to adjust the fuel economy numbers in the model. If I used the average from a lot of different numbers, I think the vehicle weight would need to come into the discussion as well.

Best

Mark

[photoprado Avid PP Poster! Find all posts View Profile Close photoprado]

If I used the average from a lot of different numbers, I think the vehicle weight would need to come into the discussion as well.

Yep. Add: Tyre size and pressures, roofrack, bullbar & load, lift, average speeds, terrain.

[Whitey Shockie Maker of the Month Award Find all posts View Profile Close Whitey]

Just because I haven't got 10 years of records, doesn't mean my numbers are wrong. They are just different to Rob's. It's great to have a load of data from one vehicle, but as it comes from a single prado with the same driver then it is not the bible. There is more to the fuel consumption of a vehicle than the date of manufacture and the fuel type.

Hey,

To give you an idea of how things can change;

If you gained 1.0litre/100km for the diesel (from 12.4 to 11.4), and without changing the 15.2l/100km for the petrol, you'll gain around $212/year in favor of the diesel.

That would give $399/year in favor of the diesel for fuel plus servicing.

Throw in the rego difference of $169/year between 4 cylinder and 6 cylinder as well from post #57, and you're looking at $568/year, or around $47.33/month.

So from 11.4-12.4l/100km economy for the diesel, all inclusive (fuel + service + rego) you will save $356-568/year.

Best

Mark

[photoprado Avid PP Poster! Find all posts View Profile Close photoprado]

Ok, and the range difference is?

(I don't really care about the $356-568 difference per year. Who worries about that?)

[Whitey Shockie Maker of the Month Award Find all posts View Profile Close Whitey]

Ok, and the range difference is?

(I don't really care about the $356-568 difference per year. Who worries about that?)

Hey,

The model assumes 300km/week driving over a 10 year period for both diesel and petrol, as I described in post #1.

The whole purpose of the thread is to establish a cost comparison, which is what anyone who owns a car and has a bank account worries about!

Best

Mark

[cuda Advanced Member Find all posts View Profile Close cuda]

Can someone please explain to me why Toyota reduced the diesel GXL RRP (special price) but not the V6 variant? Would they not discount the vehicle that is having a slump in sales? Anyway both diesel and petrol variants do a great job of satisfying all drivers. Well done Toyota!!! Would be great to see a V6 diesel though would think that would sway 90% of the current petrol drivers to convert.

Extract from Sunshine Coast Newspaper:

By 2008 80% of Prado sales were diesel, it was 90% in 2012 and this year 98.8% opt for the diesel rather than petrol variant. It's questionable why Toyota still offers a petrol option in its Prado range,

[Whitey Shockie Maker of the Month Award Find all posts View Profile Close Whitey]

Can someone please explain to me why Toyota reduced the diesel GXL RRP (special price) but not the V6 variant? Would they not discount the vehicle that is having a slump in sales? Anyway both diesel and petrol variants do a great job of satisfying all drivers. Well done Toyota!!! Would be great to see a V6 diesel though would think that would sway 90% of the current petrol drivers to convert.

Extract from Sunshine Coast Newspaper:

By 2008 80% of Prado sales were diesel, it was 90% in 2012 and this year 98.8% opt for the diesel rather than petrol variant. It's questionable why Toyota still offers a petrol option in its Prado range,

Hey,

If there was a grunty V6 diesel for the Prado I'd have one!

Best

Mark

[Anth120playdo Banned Find all posts View Profile Close Anth120playdo]

Hey ####,

What are your thoughts on the DPF cost wise, do you think it will end up being big bucks outside the service schedule again, like the egr with injectors?

The European experience looks costly so far, extra driving for burn offs, multiple and costly in-house DPF burn offs due to lack of driving, replacements from too much clogging etc etc.

Best

Mark

No idea really, if its anything like the other makes it may be a p.i.t.a.
Lets hope they got it right.

[photoprado Avid PP Poster! Find all posts View Profile Close photoprado]

The whole purpose of the thread is to establish a cost comparison, which is what anyone who owns a car and has a bank account worries about!

I have a car and a bank account. I certainly do not worry about that!

Range is way more important that a few dollars a week.

[Whitey Shockie Maker of the Month Award Find all posts View Profile Close Whitey]

Range is way more important that a few dollars a week.

Hey,

Here ya go, just for you.

Range vs economy;



I've labelled the points used in the cost comparison model. Petrol has 1184.2km range at 15.2l/100km, and diesel has 1451.6km range at 12.4l/100km.

Best

Mark

[BiLLz0r Advanced Member Find all posts View Profile Close BiLLz0r]

Hey,

If there was a grunty V6 diesel for the Prado I'd have one!

It'll never happen though as Toyota think it'll bite into the 200 Series sales too much.

[OldGreyFart Advanced Member Find all posts View Profile Close OldGreyFart]

http://www.carsguide.com.au/car-news...ncy-myth-22846

A second opinion ?

That article is from 2013 when diesel was $1.60 it claims. My last purchase this week was at $1.27.

[Whitey Shockie Maker of the Month Award Find all posts View Profile Close Whitey]

That article is from 2013 when diesel was $1.60 it claims. My last purchase this week was at $1.27.

Hey,

Yeah that article is a bit old now, however, my model reflects the historical rise and fall. The last point in the diesel data is 126.45cents/litre (national average), so almost spot on what you paid.

Best

Mark

[Whitey Shockie Maker of the Month Award Find all posts View Profile Close Whitey]

Hey all,

Here is a Range vs Economy plot that shows the relative cost saving at various economies for the diesel.



I haven't changed the petrol economy at 15.2l/100km.

The parity for the diesel is around 14.3l/100km, and the only thing that makes it cheaper at 14.5l/100km is the difference in rego.

Note that this plot is for the 120 series only.

Significant savings to be had if you can keep your total average diesel economy down to 10l/100km, $908/year.

Best

Mark

[Bushbasher Out of control poster! Find all posts View Profile Close Bushbasher]

[QUOTE=Whitey;5318] Significant savings to be had if you can keep your total average diesel economy down to 10l/100km/QUOTE]

I wish.