Petrol equivalent to current diesel mpg

soupdragon10

I currently run a diesel which gives me about 55 - 58 mpg. As my mileage is now going to be lower I am looking for a petrol car which will give me a similar motoring cost per mile.
I have searched for information online but found nothing, so came here.

What I need to know is what kind of petrol mpg would I need to look for in my next car to give me the same costs as my current diesel, as I know petrol is considerably cheaper - around £1.28 as opposed to £1.35 for diesel at my local garage.

jase1

55/1.35*1.28 = 52mpg.

Going to have to be quite small to achieve that.

Rather than going for a tiny, turbocharged petrol engine in the hope of matching this, I'd be inclined to take the hit on economy and buy into older technology -- a normally-aspirated 1.4 or 1.6. You'll only be talking 40-45mpg but the car will be cheaper to buy and there is much less risk of expensive problems.

Yolina

Are you after a new, nearly new or older car?

I have a Yaris Hybrid, my real mpg (calculated by me over a tankful) is 73mpg in summer and 62mpg in winter. Not too shabby for a petrol car

marlot

Everyone seems to get obsessed with fuel consumption and road tax, but they are only a smallish part of the total motoring cost.

Depreciation is the big killer. Unless your diesel has a DPF, so might not cope well with low mileage, you would need so save a lot of fuel to make it worth replacing.

I would add up the total annual cost of running your current car, against the total annual cost of its proposed replacement. Make sure you include the depreciation.

DUTR

soupdragon10 wrote: »

I currently run a diesel which gives me about 55 - 58 mpg. As my mileage is now going to be lower I am looking for a petrol car which will give me a similar motoring cost per mile.
I have searched for information online but found nothing, so came here.

What I need to know is what kind of petrol mpg would I need to look for in my next car to give me the same costs as my current diesel, as I know petrol is considerably cheaper - around £1.28 as opposed to £1.35 for diesel at my local garage.

I wouldn't call 7p/litre considerable, anyways as a quick guestimate 1.28/1.35= 0.95
so you want a petrol car that would be giving 52 mpg with the same driving pattern.
However the maths is not quite that simple and it depends how many less miles you will be doing, and also if those are the realistic figures you are achieving.
From another forum, it looks like the 2 litre GTI returns the same MPG as the 1.4TSI for mixed driving. And the diesels are not returning near the quoted MPG, but either way you will be spending to save unless you stick with what you have (assuming the vehicle is paid for and all you have is running costs).

DUTR

marlot wrote: »

Everyone seems to get obsessed with fuel consumption and road tax, but they are only a smallish part of the total motoring cost.

Depreciation is the big killer. Unless your diesel has a DPF, so might not cope well with low mileage, you would need so save a lot of fuel to make it worth replacing.

I would add up the total annual cost of running your current car, against the total annual cost of its proposed replacement. Make sure you include the depreciation.

Disagree, some items you buy with the mentality that you have lost all the purchase price, then when you come to resell anything you get back is a bonus.
Always breaks my heart when somone has worked hard only to become the richest person in the cemetry with the offspring (who should have been nurtured to stand on their own feet ) fighting over what money remains, nobody loves a dead hero, what you do and did whilst you are alive is what counts.

fatbelly

marlot wrote: »

Everyone seems to get obsessed with fuel consumption and road tax, but they are only a smallish part of the total motoring cost.

Depreciation is the big killer. Unless your diesel has a DPF, so might not cope well with low mileage, you would need so save a lot of fuel to make it worth replacing.

I would add up the total annual cost of running your current car, against the total annual cost of its proposed replacement. Make sure you include the depreciation.

I agree with this.

By buying a diesel car a few years old you will be avoiding the dreaded DPF and getting one that will depreciate less.

1.9 PD VAG units continued into 2008/2009 and don't have them fitted. I used to run a Fabia that would happily do short journeys and still return mpg in the mid-50s.

However, if you're determined to have a new car, petrol, and still want low fuel consumption, check Honest John for real mpg. I think you're going to have to run something small (like an Up/Mii/Citigo) to get those figures.

daveyjp

If your mileage is reducing your current car may not achieve what you are currently getting so it may not be easy to compare. If you want 50ish mpg from a petrol you are into C1, Aygo, Up territory. 1.0 three cylinder engines.

We endured a £30 a year road tax supermini for 6 months and my thoughts are never again. Rather pay £125 and get something which is actually driveable, but doesn't get any less mpg.

Stoke

For me, if you want a small car, go for a Daihatsu Cuore. When driven economically, they've been known to get over 60mpg. For a shorter run, you're looking at between 45 and 50, but they cost pennies to buy and maintain (Seen 2000-2003 models sold for under £600), have electric everything and most even come with air conditioning!!

Toyota engines as well.

sunshinetours

DUTR wrote: »

Disagree, some items you buy with the mentality that you have lost all the purchase price, then when you come to resell anything you get back is a bonus.
Always breaks my heart when somone has worked hard only to become the richest person in the cemetry with the offspring (who should have been nurtured to stand on their own feet ) fighting over what money remains, nobody loves a dead hero, what you do and did whilst you are alive is what counts.

This is MSE isn't it and the original question is being asked from an MSE point of view

Depreciation will almost certainly be the biggest cost on any newish car - wanting a new car or certain type of car doesn't change that fact

londonTiger

alcohol for fuel runs better and apparantly if you run a petrol car on alcohol all the time the engine stays remarkably clean and can easily run cars into 500K+ mileage.

Apparantly cars were originally designed to run on alcohol but were later changed to use petrol as petrol was seen as a free and easily available resource back during pre ww1 era.