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Just did the first refuel since the new tyres were fitted, and the mpg is shocking, only 53, the worst I've ever had. The previous three tanks gave 64, 60 and 61 mpg. So a ~15% drop over what might have been expected. The tyre label gives E fuel economy, compared to C for Michelin CrossClimates and A for Goodyear EfficientGrips (my previous tyres).
If the CrossClimates fuel economy is between the two Goodyears, then the higher price will be paid for many times over during their lifetime from fuel savings! Then again the autoexpress review does suggest the two all weather tyres have similar rolling resistance.
However I did have the car serviced (major) just before the new tyres went on, so it is conceivable that something was done during the service that has caused a poor mpg, but is this likely? It has never happened before.
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Just done some research and tyres are supposed to contribute ~15% to the cars fuel consumption so my results are way over what might be expected. Mmmm.
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I fitted CCs to teh Jazz 12k miles ago.
Fuel consumption over the period unchanged at 42.7mpg. (mainly town driving plus a regular foray on single track roads each beekeeping week rising and falling 150meters and stopping for horses, shiny 4x4s driven by people who will not or cannot reverse and the odd delivery lorry)
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Seems to suggest that the fuel ratings really work. I have never bothered to check but always go for the highest fuel rating and next the sound rating. grip is the least of my worries being no Lewis Hamilton!
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grip is the least of my worries being no Lewis Hamilton!
I'd suggest that the entire point of fitting winter (or all seasons) tyres is grip... A friend fitted winter tyres to his car a couple of years ago after seeing how well mine worked getting us both up a hill which had defeated 3 cars before us. The following weekend he was driving in the borders, and just after going around a gentle bend he noticed in his mirror that the car behing him, doing the same speed, was sliding out of control and a moment later ended up on its side in a ditch. Saving a few pounds for the fuel rating can cost a lot more in the long term!
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grip is the least of my worries being no Lewis Hamilton!
I'd suggest that the entire point of fitting winter (or all seasons) tyres is grip... A friend fitted winter tyres to his car a couple of years ago after seeing how well mine worked getting us both up a hill which had defeated 3 cars before us. The following weekend he was driving in the borders, and just after going around a gentle bend he noticed in his mirror that the car behing him, doing the same speed, was sliding out of control and a moment later ended up on its side in a ditch. Saving a few pounds for the fuel rating can cost a lot more in the long term!
Had no snow to test CCs in.
But they are superb for traction on deep mud on roadsides or on wet grass facing up a hill...
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grip is the least of my worries being no Lewis Hamilton!
I'd suggest that the entire point of fitting winter (or all seasons) tyres is grip... A friend fitted winter tyres to his car a couple of years ago after seeing how well mine worked getting us both up a hill which had defeated 3 cars before us. The following weekend he was driving in the borders, and just after going around a gentle bend he noticed in his mirror that the car behing him, doing the same speed, was sliding out of control and a moment later ended up on its side in a ditch. Saving a few pounds for the fuel rating can cost a lot more in the long term!
Exactly, grip in normal weather is not the issue for me, I wanted tyres that would cope with a few inches of snow or some slush without the car fishtailing. That said, the last time we had a huge snow fall, I was unable to get through the back roads due to Range Rovers stuck in the snow. I could get through the snow, but not the Range Rovers!
Oddly enough the mpg was back up to the expected value for the 25 mile commute this morning, it makes me wonder if something was temporarily wrong with the engine management (sending in too much fuel?) or having filled up with fuel on Sunday maybe there was a bad tank of fuel. Does that happen?
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" That said, the last time we had a huge snow fall, I was unable to get through the back roads due to Range Rovers stuck in the snow. I could get through the snow, but not the Range Rovers!"
People buy RRs fitted with normal road tyres..Muppetry.. (I see it all the time here)
If you need the grip, you need Mud and Snow tyres.
If you don't need the grip, you don't need a 4x4..
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" That said, the last time we had a huge snow fall, I was unable to get through the back roads due to Range Rovers stuck in the snow. I could get through the snow, but not the Range Rovers!"
People buy RRs fitted with normal road tyres..Muppetry.. (I see it all the time here)
If you need the grip, you need Mud and Snow tyres.
If you don't need the grip, you don't need a 4x4..
There’s a video on YouTube of a 4x4 RR I think) on summer tyres failing to climb a snow covered slope, whilst a normal car on all weather or winter tyres succeeds. You might have seen it.
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Seems to suggest that the fuel ratings really work. I have never bothered to check but always go for the highest fuel rating and next the sound rating. grip is the least of my worries being no Lewis Hamilton!
You don't find grip important when purchasing tyres? Surely that's the point of them! LOL
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Just did the first refuel since the new tyres were fitted, and the mpg is shocking, only 53, the worst I've ever had. The previous three tanks gave 64, 60 and 61 mpg. So a ~15% drop over what might have been expected. The tyre label gives E fuel economy, compared to C for Michelin CrossClimates and A for Goodyear EfficientGrips (my previous tyres).
If the CrossClimates fuel economy is between the two Goodyears, then the higher price will be paid for many times over during their lifetime from fuel savings! Then again the autoexpress review does suggest the two all weather tyres have similar rolling resistance.
However I did have the car serviced (major) just before the new tyres went on, so it is conceivable that something was done during the service that has caused a poor mpg, but is this likely? It has never happened before.
As regards mpg, when I changed from Dunlop SP Sport Fastresponse (summer tyres fitted in 2012), I noticed very little change in mpg to my current Michelin CC+s (2018), but then that was expected as both were C rated.
I didn't realise the GY 4S G2 tyres were E rated for mpg - maybe yours are an odd size which for somereason means they drop the mpg considerably (apparently one or two CC+ tyre size combos are the same, such as my Dad's car's 1950/50 R15 tyre size). I could easily imagine this was also the case for the Gen-1 GY tyres. Hopefully that wasn't the case, as if it was, you may well have been defrauded.
I presume the temperature/weather/lack of daylight wasn't also much of a factor in the sharp mpg drop? Still, 13 more than I get in my car on average!
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I presume the temperature/weather/lack of daylight wasn't also much of a factor in the sharp mpg drop? Still, 13 more than I get in my car on average!
Nothing out of the ordinary compared to the previous tanks of fuel.
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However I did have the car serviced (major) just before the new tyres went on, so it is conceivable that something was done during the service that has caused a poor mpg, but is this likely? It has never happened before.
Possibly car was left running for an extended period, shows nothing on mileage but of course still uses fuel. Good to note after next fill up MPG was more normal
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However I did have the car serviced (major) just before the new tyres went on, so it is conceivable that something was done during the service that has caused a poor mpg, but is this likely? It has never happened before.
Possibly car was left running for an extended period, shows nothing on mileage but of course still uses fuel. Good to note after next fill up MPG was more normal
It’s still down maybe 10% according to the computer. I record each tank full and mileage, so I’ll know in a few weeks if this is real.
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I've just had G 4S G2 fitted to my 308, and have noticed a slight rise in fuel consumption, but only on the first tank since the change - will be interesting to see how much difference they make in the long run
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I've just had G 4S G2 fitted to my 308, and have noticed a slight rise in fuel consumption, but only on the first tank since the change - will be interesting to see how much difference they make in the long run
There will be a slight drop, even on like-for-like tyres used in the same conditions/circumstances as the rolling diameter of teh new ones is slightly larger, due to the extra tread depth. Normally, going from summer to all-season tyres will drop the mpg a bit because they are a softer compound to get better grip in the cold.
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There will be a slight drop, even on like-for-like tyres used in the same conditions/circumstances as the rolling diameter of teh new ones is slightly larger, due to the extra tread depth. Normally, going from summer to all-season tyres will drop the mpg a bit because they are a softer compound to get better grip in the cold.
On a typical lorry limited to a genuine 56mph, by the time the tyres are down to 3mm (when they get removed) the actual road speed per satnav will be a genuine 54mph but still showing 56 on the speedo, and thats without the tyres being recut which many other operators do, when by the time another 5 or 6mm of tread has been used and they're down to 2mm another 1mph will be wiped off.
As you say this must reflect in slightly worse fuel consumption with new tyres if for no other reason than you've actually travelled that bit further on the new rubber.
Grip/friction increase is the other and probably more pertinent issue, wheelspins on lorry drive axle tyres are multiple times more likely when they are well worn (and when first fitted), better grip will always equal more fuel to push the vehicle along.
Like most others here i'm not that bothered about fuel figures on my cars, wet grip comes first with noise and ride being equal seconds, fuel efficiency is probably the very last concern.
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Just did the first refuel since the new tyres were fitted, and the mpg is shocking, only 53, the worst I've ever had..
The mpg of all our household's cars has plummeted in the last couple of months. They're giving probably 20% lower mpg than in the summer and among the worst mpg figures I've ever seen.
Cold, wet roads seem to add a lot of drag to any car, regardless of tyre type. It has been windy recently, too, which seems to hurt mpg. There's also longer engine warm-up times and a constant need for lights, demisters, wipers etc.
When I changed one of my cars from eco tyres to all-season tyres the weather happened to be fairly similar before and after the change; the mpg dropped by several percent.
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Just did the first refuel since the new tyres were fitted, and the mpg is shocking, only 53, the worst I've ever had..
The mpg of all our household's cars has plummeted in the last couple of months. They're giving probably 20% lower mpg than in the summer and among the worst mpg figures I've ever seen.
Cold, wet roads seem to add a lot of drag to any car, regardless of tyre type. It has been windy recently, too, which seems to hurt mpg. There's also longer engine warm-up times and a constant need for lights, demisters, wipers etc.
When I changed one of my cars from eco tyres to all-season tyres the weather happened to be fairly similar before and after the change; the mpg dropped by several percent.
Very true but in my case I use one tank of fuel a week, and the weather conditions for the last fill were as per the previous few fills. But as I said before, it's the long term trend that will tell me if something odd has happened.
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Very true but in my case I use one tank of fuel a week, and the weather conditions for the last fill were as per the previous few fills. But as I said before, it's the long term trend that will tell me if something odd has happened.
Tyres often improve in mpg as they wear down because of the reduced tread (less friction, less block-flex). But of course as they wear their wet and snow abilities rapidly decrease.
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