New car mpg

MARKMAKAVELI

Hi,

Perhaps a very simple Q&A but....
If a new car states 60mpg and my current older car gets 30mpg, is it safe to safe I would expect to roughly halve my fuel costs?

I know mpg figures are often over shouted, but in very approx terms is this right? Looking at a new lease car and wondering if this can factor into the cost analysis.

Thanks
Mark

worried_jim

Compare the car you have now with the one you intend to buy here-

http://www.honestjohn.co.uk/realmpg/

or

http://www.fuelly.com/car

then do your sums.

MARKMAKAVELI

Thanks worriedjim.

So it says the new car really gets an average of 50mpg.

It says mine gets around 40 but I'm sure it gets 30-35mpg max.

So if this is true the saving wouldn't be that significant.
If I pay £80pm now I'd probably pay around £50?

WellKnownSid

Obviously depends on many factors - £80 per month suggests a very low mileage, which might mean a lower mpg just because the engine never fully warms up.

Are both cars the same fuel?

MARKMAKAVELI

Yep both diesel and I do 10k or less p/a

Judging from the very helpful replies, it looks like I can safely say I would save just £20 p/m.

DUTR

MARKMAKAVELI wrote: »

Hi,

Perhaps a very simple Q&A but....
If a new car states 60mpg and my current older car gets 30mpg, is it safe to safe I would expect to roughly halve my fuel costs?

I know mpg figures are often over shouted, but in very approx terms is this right? Looking at a new lease car and wondering if this can factor into the cost analysis.

Thanks
Mark

Simple answer is NO!
The tests are done in a very controlled enviroment, which rarely reflect real life driving conditions, gentle acceleration and other controlled driving characteristics are near impossible to repeat on the road.
Chances are the later car will return a better mpg, but how much is unlikely to be more than 25% on a run assuming the same type of fuel. Also even if there was a 100% mpg gain, you lose that on the purchase of the newer car.
But of course go for that newer car, you have worked hard for it, treat yourself.

BillyFord

MARKMAKAVELI wrote: »

Yep both diesel and I do 10k or less p/a

Judging from the very helpful replies, it looks like I can safely say I would save just £20 p/m.

Some may say you use the wrong fuel.

agrinnall

Less than 10K is a low mileage to justify using diesel, if a high proportion of that mileage is journeys of a reasonable distance then it might be worthwhile, but if it's a lot of short journeys then a petrol car would probably be a better option.

Marktheshark

You need to factor other costs, if the new diesel has a DPF , they go wrong often and cost, sometimes a yearly bill of £1500.
Average DMF life span before its another £1500 pay out time.

MPG is not the only cost, that and EU legalisation is on he table to ban all diesels from all cities and if it makes it, the car will be useless if you have to pass through any kind of city.

misterbarlow

Our new car had book figures of 65mpg and we rarely get over 40...

bigjl

I'm with WorriedJim

Compare your current and proposed cars with the RealMPg figures.

Look at your current car and how it compares with others experiences.

If you are above average you will likely be above average in your next car.

I always full out the RealMPG surveys.

To be honest I have always found that I usually get the overall MPG figure near enough overall.

The only car that exceeded MPG expectations was the wife's old Clio Dci, 68bhp mk3 without a DPF.

Gave 61mpg when used almost exclusively round town.