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Old 09-18-2011, 12:30 PM   #1
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Diesel vs Petrol

Hello,

I need some advice about whether to go for a petrol or diesel Focus. Diesel seems to work out cheaper on mpg but some people say this depends on the length of journeys you make, i.e. short journeys are not as efficient. Any idea why? What constitutes a long or short journey?

Any help is greatly appreciated.


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Old 09-18-2011, 12:45 PM   #2
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First of all, welcome to FF

second, which Focus Mk3, Mk2???

third, if your doing around 7000 miles per year petrol is cheaper to run + it's cheaper to buy that why petrol is better if your not driving much.

but if you do a lot of miles than driving diesel saves your money!

i hope this helps!

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Old 09-18-2011, 02:12 PM   #3
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Probably a mk2 1.6.

So diesel is bad at low mileage purely because of the extra initial cost? Am I right in saying that short journeys are no less economical if you do more of them? So a diesel doing short journeys which add up to 12,000 miles is better than a petrol doing the same?
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Old 09-18-2011, 03:26 PM   #4
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I would guess a lot of start and stop driving... That is short journeys where you actually shut off the engine a lot is not good for a diesel.
Say around town to do the groceries, and a few errands, as your only driving.
Buy the pertol engine.
If you have a thrity mile commute twice every day, buy the diesel.
The diesel like to start up and stay running more than the petrol engine.
So a lot of short trips where the engine barely has time to warm up is worse for a diesel. Ten minutes running and then shut off, not good for a diesel.
Longer trip where the diesel is running for near a full hour is more in line with a diesels positives..
Hope this helps decide.
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Old 09-18-2011, 06:14 PM   #5
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1.6 100 or 115 hp petrol???

100 hp average 8.5 litres per 100 km.


diesel would be better if you do 12000 miles.
About the start-stop, well in driving school i drove Renault Clio 1.5 dCi and my instructor was killing that car with bad gearchange, sometimes he turn on the car and after 50 meters - he turns the car off, and car was working well (even my brother was driving the very same 1.5 dci clio 5 years before me)

so it depends on the engine i think,

GuitarMan, try some uk focus forums where people have experiance with diesel engines?

also, keep in mind 1.8 diesel is 100% ford while 1.6/2.0 diesel engine are made by Ford and PSA
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Old 09-19-2011, 05:03 AM   #6
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i would definitely go for a diesel..
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Old 09-19-2011, 06:33 AM   #7
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It's easy... if you're planning to keep a car until it completely dies and disintegrates of old age, then diesel is the way to go. Generally speaking diesel engines have an outstanding lifespan. They last much, much longer than regular gasoline engines. In other words fuel economy isn't the only reason why they're more expensive.

If you have a habit of trading your car in after 100k miles or so, then it would definitely be cheaper just to stick with "petrol". The goal is to make up the initial cost of purchase by keeping the car longer. Most consumers won't benefit from diesel engines because they won't hold onto the car long enough to offset that extra cost.


Btw, 7000 miles per year is laughable. I drive about 22000 miles per year. I wish I had waited for the 2010 Golf TDI. :-(
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Old 09-19-2011, 07:40 AM   #8
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Quote:
Originally Posted by GuitarMan View Post
Probably a mk2 1.6.

So diesel is bad at low mileage purely because of the extra initial cost? Am I right in saying that short journeys are no less economical if you do more of them? So a diesel doing short journeys which add up to 12,000 miles is better than a petrol doing the same?
Another + for petrol engine is that diesel fuel is more expensive now in the UK then petrol.
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Old 09-19-2011, 08:18 AM   #9
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It's also more expensive here in the States. Although I've read that diesel is much cheaper in Germany, which is why we see a lot of diesel options for German cars.

Even if Diesel is more expensive I still think it's worth it. Mythbusters went from San Francisco to Las Vegas on a single tank. People can push numbers around all they want but that speaks for itself. There are tons of other examples on YouTube showing similar results. The instant torque they provide also makes them fun daily drivers.

I really hope Ford comes to its senses and gives us a TDCi Focus and Fiesta. I'd definitely consider diesel for my next car.
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Old 09-19-2011, 08:26 AM   #10
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Quote:
Originally Posted by mmmoose View Post
It's also more expensive here in the States. Although I've read that diesel is much cheaper in Germany, which is why we see a lot of diesel options for German cars.

Even if Diesel is more expensive I still think it's worth it. Mythbusters went from San Francisco to Las Vegas on a single tank. People can push numbers around all they want but that speaks for itself. There are tons of other examples on YouTube showing similar results. The instant torque they provide also makes them fun daily drivers.

I really hope Ford comes to its senses and gives us a TDCi Focus and Fiesta. I'd definitely consider diesel for my next car.
I'd consider one too, but most americans wouldn't.
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