What's your fuel economy

[jem111111]

Hi all
As I'm new to the Phev , I thought I would share my fuel economy and see what others are getting.
I know going forward I will probably just accept what I'm getting and have less interest, but for now I am interested in what I'm getting.
If I'm reading this right , then its looking good.
In the UK we use miles per gallon ( MPG ) but I know in Europe you use L/100km so I've used a great conversion web site ( dutchdigital) to hopefully do the conversions so we can all comment.
Looking at my accumulated totals I have the following
So I have done 298 miles ............................................ 480km
122 mpg ..................................................................................2.315 l/100km
27Kwh/100mls ( 3.7 mi /kwh) = 149 mpg .................16.777kwh/100km(5.9 km/kwh) = 1.88 l/100km

Obviously this will fluctuate the more I use the ICE. .
I try to use mainly used EV mode but last week I have used the hybrid mode , just to see what economy I get.
I drove out of rush hour , (so travelling on mainly 30-40 mph 48-64kmh roads ) and small journeys ( between 4- 10miles round trip
I saw on average 45 mpg and 33 Kwh/100mls ( may be the ICE did not really warm up until the short journeys were over hence the low MPG, but cant see a temp gauge for the ICE anywhere , how strange)

I did report when I 1st had the car I did a 50 miles round trip mixed urban and motorways and got 90MPG on that trip so not too bad.
This may be an obvious statement , but the figures do back up how you should use a Phev to get the best fuel economy, EV mode as much as possible and only the ICE when you need to , and no fear of range anxiety anywhere to be seen

The reason I am using the hybrid mode more , as the ICE will need "running in" , to loosen it before I do some longer trips, or is that an old thing to do to new engines now?

I suppose in the end it could come down to cost of electric vs cost of petrol , so the only way to do this is cost per mile.
So my electric costs 14p per kwh ( but I am in the process of moving to octopus go where it will be 5p per kwh when I charge my car) .
I also drove the short journeys with my 1.0 ltr turbo kia , and got between 30mpg to 40mpg for the short journeys and 50mpg on longer journeys of over 20miles.
Petrol is £1.25 per litre = £5.68 per gallon
So I am getting 122 mpg ( I am guessing this is a mixture of petrol and electric to get this figure) = 4.6p a mile
I am getting 3.7 miles (5.9km) per kwh. = 3.8p per mile ( that will go to 1.3p when on octopus go)
On my long journey where I saw 90 mpg this equates to 6.3p a mile

So in the petrol car
30mpg = 19p per mile
40 mpg = 14p per mile
50 mpg = 11p per mile.
Interesting results and again depends on how many miles you do in a year will depend on how much money you will ultimately save.
Using hybrid mode on the short journeys I got the following
45mpg =12.6p per mile
33kwh/100mls = 3.03 miles per kwh = 4.6p per mile ( 1.65p when on octopus go).
So even in hybrid and doing short journeys its still cheaper using the MG Phev than using my Rio, (which is a smaller and lighter car ), which is not as comfortable as the MG LOL.

So in conclusion we have a much bigger, heavier and nicer car in the MG , and its much cheaper to run ( has better fuel economy) than my 1.0 ltr Kia

just seen an interesting video ( HG HS highway driving by Anil . He is driving a phev by the way. So after 413 km ( 268 miles) he achieved 17.8 km/l ( 50 MPG) which seems ok .
He does mention at the end he has seen 20 and 21km/l ( 56 and 59 mph) on other journeys.
Its interesting to see he has the ability to pick the kers setting ( 1,2 or 3) where we in the uk ( and I assume Europe) do not have this ability.

 

[Greebo12]

You over complicating it her when you looking a mpg you literally just want to look at how much petrol you used over the mikes covered you do not need to factor in you battery use as thats nothing todo with the fuel used .the computer read out forget that because it give a false reading as it does the calculation your doing
Literally recorded the fuel used over the distance covered that gives you the true mpg for get yourr battery consumption
My cars system was giving 140mpg in reality tank fill to tank fill it worked out as 50mpg which is goood asbthe ice version is around 34mpg best doing the old way ok if you wantbto workmout the fuel saving in money then you work in your charging cost
I save about £25 week on phev over ice

 

[jem111111]

We all have different ways of working out the economy of our cars.
I decided to look at it from the cost of both petrol and electricity ( as its also a fuel ) for the phev against just petrol for my KIA.
In the end we both came to the same conclusion its cheaper to run the phev than an ICE .
I know going forward I will probably loose interest in all these figures (lol) but as its a new toy its nice to see how much I am saving. , and we have a great looking and great car to drive.

 

[amason]

Even though I am now getting atrocious range from my Outlander PHEV in EV mode it
still is far cheaper to run vs the Subaru Outback I had before it. When I was getting decent
range from the Outlander my fuel costs were about one tenth of the Subaru. My typical
daily driving needs varies from 30 to 60km each day, within the range of most PHEVs.
So I think its a matter of buying a vehicle fit for your purpose, so if a PHEV is a fit for your
smaller frequent driving, if you charge it, its going to do well for you and be cheap to
run especially if you have solar.

 

[Gelf]

On my PHEV, I tested the gasoline mileage.
I started (and ended) with 0 kWh in the battery. Then drove 848 km and needed 68.4 liters of gasoline for that. This amounts to 12.4 km/l, which I find disappointing.
The driving style was quiet, i.e. 90-100km/h, mostly on the highway. It did include like 25 or so kms of 125 km/h.

I have not yet pinpointed the electricity consumption, but my impression is that it comes pretty close to the factory-stated 52 km/full charge. Again, with pretty careful driving.

 

[jem111111]

Hi Gelf
Looking at the fuel consumption economy of the normal MG HS 1.5 t petrol car , you look like you achieved its expected 35-37 MPG ( 12-13 KM/l ) when you were on petrol. Remembering once the battery is used up , then basically the phev reverts to the normal petrol car , but now also carrying the batter and electric motor , so its economy will be less than the normal petrol HS

 

[Dragonfly]

Hi Gelf
Looking at the fuel consumption economy of the normal MG HS 1.5 t petrol car , you look like you achieved its expected 35-37 MPG ( 12-13 KM/l ) when you were on petrol. Remembering once the battery is used up , then basically the phev reverts to the normal petrol car , but now also carrying the batter and electric motor , so its economy will be less than the normal petrol HS

I disagree, even with a flat battery, you get regen braking, and a boost from the motor. In stop start traffic my battery stays low once I've drained it, but over longer runs I tend to build a little charge which I can then use in EV Mode, reducing my petrol usage by a couple of miles.

All this after 3 days of usage ?

 

[sky0000547]

After all that economy calculations above if I ran out of electric juice and needing to use the engine (i.e using fuel) to get home. If I have time and want to use a public type 2 charger to top up, what is the break even pence per kWh I should pay so I can use full EV instead of using fuel?

 

[jem111111]

After all that economy calculations above if I ran out of electric juice and needing to use the engine (i.e using fuel) to get home. If I have time and want to use a public type 2 charger to top up, what is the break even pence per kWh I should pay so I can use full EV instead of using fuel?

Hi Sky a good question but you have to remember you can only use type 2 connectors ( not the rapid chargers) so it will will be slower to charge.

In the end its up to you what you are willing to pay.
I am also not sure what the maximum AC to DC charge rate is , so I will assume its 7 KW so anything over this will not charge any quicker due to the car.
So on the supplied granny charger 3 pin plug into mains ( 10 A ) it takes about 5hr 30 mins to charge from 1%-100%
If you can go to a Tesco's they have pod points ( 7 kw) where you can charge for free , and I'm guessing this should take approx 2hrs 45 mins.
I have looked for 7kw chargers on zap map and BP pulse charges are either free ( but you have to pay £1.20 to use it ( then its a free charge , free??) or on other sites 18p-20 per kw ( so not much more than charging from home on a normal tariff) but are in car parks , and there may be a car park charge.
So its no easy.
The best way is to use zap map to look at the area you may want to do this and check the local chargers for the prices.

 

[sky0000547]

The maximum onboard charger on the PHEV should be around 3.6kW so even plugged into 7kW charger it will still charge at 3.6kW.

Ignoring the free charge points in this example but if a charger is available for let’s say 20p-25p/kWh and you are parked for an hour or two or even three, perhaps it’s cheaper to pay to charge than run ICE to get home. We are probably talking peanuts here but at the end of the day we all want to run in EV as much as possible but obviously not paying more to charge than just run it on ICE.

 

[jem111111]

The maximum onboard charger on the PHEV should be around 3.6kW so even plugged into 7kW charger it will still charge at 3.6kW.

Ignoring the free charge points in this example but if a charger is available for let’s say 20p-25p/kWh and you are parked for an hour or two or even three, perhaps it’s cheaper to pay to charge than run ICE to get home. We are probably talking peanuts here but at the end of the day we all want to run in EV as much as possible but obviously not paying more to charge than just run it on ICE.

so working it out quickly as per my 1st post as price per mile in EV mode then comparing that to the price of a gallon of petrol for comparison, I think its approx the following
This is working it out on 25p kw and petrol £1.25 a litre = £5.62 a gallon
So if you got 3 miles per KWh
25 / 3 = 8.3 p per mile per KWh
Now divide a gallon of petrol (£5.62) by 8.3 give an equivalent ( in my eyes) of 62 mpg
Working out 4 miles per KWh
25/4 =6.25
Gives an equivalent of 89 mpg

So depending how you drive will give a better or worse result

I hope this helps

 

[Dragonfly]

The maximum onboard charger on the PHEV should be around 3.6kW so even plugged into 7kW charger it will still charge at 3.6kW.

Ignoring the free charge points in this example but if a charger is available for let’s say 20p-25p/kWh and you are parked for an hour or two or even three, perhaps it’s cheaper to pay to charge than run ICE to get home. We are probably talking peanuts here but at the end of the day we all want to run in EV as much as possible but obviously not paying more to charge than just run it on ICE.

The spec suggests it's a 7kw, but I have no means of confirming that it definitely is.

 

[jem111111]

Hi dragonfly , I was struggling also to find out , but I did find on the mg web site , it would charge to full in 3 hours on a 7 KW charger. So that might mean it might be a 5.5kw (16.6 / 3 ) charger onboard

 

[Dragonfly]

Or a 7kw charger, and slows down towards full. Our leaf definitely does this.

 

[jem111111]

Yes good thinking

 

[sky0000547]

Or a 7kw charger, and slows down towards full. Our leaf definitely does this.

All PHEV tends to have 3.6kW onboard charger. Not doubting a full EV can charge at 7kW because they are more than capable. Again no definitive answer. MG literature says 7kW wall charger in 3hrs because that is what people use at home however not necessarily charge at 7kW. Yes it doesn’t quite add up on the math. A handful of HS PHEV owners on Facebook group confirmed using their home wall charger, the car only charged at max 3.6kW from 0%.

 

[sky0000547]

Couldn’t find one for HS PHEV but an example for Volvo XC40 PHEV.

3hrs charging for on a 22kW charger, also on a 7kW charger and finally the same 3hrs on a 3.6kW charger.

Volvo XC40 Plug-In Hybrid (2021) Charging Guide | Pod Point

The complete guide to charging the Volvo XC40 PHEV (2021), covering electric range, how long it takes to charge, how much it costs, and much more.

pod-point.com

 

[AnthonyPHEV]

Hi all - we picked up our ex-demo Exclusive PHEV ten days ago and have so far been delighted by what we’ve got for the money.

On a bank holiday misery run to Cheshire this weekend, it took nearly five hours to do 200 miles (lots of nose to tail/stop start on the M42) but still managed 43mpg overall.

My first time with adaptive cruise control and lane keeping which, combined, helped me feel like I was ‘supervising’ the car rather than doing the grunt work of driving it. They certainly made the traffic jams a lot less tiring.

I was also impressed to see that the ICE really does regenerate the battery and that we didn’t seem to incur a penalty for lugging that heavy battery up the M6.

And, if course, the 30+ local miles in EV is all jam; felt great to drive to a local National Trust house and back without calling on the ICE at all.

Looking forward to learning more from this forum.

 

[PAULinTHAILAND]

Due to all the fighting I had to be allowed to charge my HS PHEV from my off-grid system, I can confirm that the on-board charger is 3.7kW. The wall charger maybe 7kW but only 3.7kW is being pulled by the car.

 

[PAULinTHAILAND]

just seen an interesting video ( HG HS highway driving by Anil . He is driving a phev by the way. So after 413 km ( 268 miles) he achieved 17.8 km/l ( 50 MPG) which seems ok .
He does mention at the end he has seen 20 and 21km/l ( 56 and 59 mph) on other journeys.
Its interesting to see he has the ability to pick the kers setting ( 1,2 or 3) where we in the uk ( and I assume Europe) do not have this ability.

Anil recorded his video here in Thailand. The paddle shifters are used to adjust the KERS level from 1-3. I have used mine once, to select level 3.