It's hardly a suprise that when I changed from 205/50/17 to 225/45/17 tyres my fuel consumption went up from 32 to 30 mpg.

After trying Dunlop Sports, Toyos and Kumhos I'm now running Goodyear Eagle F1s, and since I had them put on I'm only getting 28 mpg.

Now it might just be down to my driving, better weather is with us so I'm going a bit faster, or it could be down to the fact I have much more confidence cornering with my new tyres, but has anybody else noticed a significant difference in mpg between different tyre brands ?

not a significance in fuel economy, but in grip yes! I think the Goodyear F1's are one of the best tyres out there, so chances are you're just driving faster !

I changed from the OEM Michelins on my Furby vRS to Toyo Proxes T1-Rs and lost maybe 1 1/2 mpg; the cost of extra grip and higher rolling resistance.

It's hardly a suprise that when I changed from 205/50/17 to 225/45/17 tyres my fuel consumption went up from 32 to 30 mpg.

After trying Dunlop Sports' date=' Toyos and Kumhos I'm now running Goodyear Eagle F1s, and since I had them put on I'm only getting 28 mpg.

Now it might just be down to my driving, better weather is with us so I'm going a bit faster, or it could be down to the fact I have much more confidence cornering with my new tyres, but has anybody else noticed a significant difference in mpg between different tyre brands ?[/quote']

Although you will notice the better grip and possibly drive faster, the softer compound of the tyres will make a difference to mpg....quite remember the actual technical term but it's something like rolling road resistance.

Autocar do an annual tyre test and one year did show how mpg was effected by the use of softer compound tyres.

I saw nearly te same numbers, I used 205 profile tyres & was getting low 30's when I switched to 225 P Zero's I am now seeing 28.somink

I changed from the OEM Michelins on my Furby vRS to Toyo Proxes T1-Rs and lost maybe 1 1/2 mpg; the cost of extra grip and higher rolling resistance.

How are you finding the T1-R ? I need 4 now and have narrowed it down to these and Michelin Pilot Exalto2 but cant decide!

How are you finding the T1-R ? I need 4 now and have narrowed it down to these and Michelin Pilot Exalto2 but cant decide!

I suspect the Michelins would last longer (too early to tell yet). The Toyos are quieter than the Michelin Pilot Primacys I had on before. They thump less over bumps in the road, and the car feels more stuck to the road rather than running over the top of it, if you know what I mean. Haven't got them to squeal or break away yet.

Do Michelin still do those tyres that are built to give better fuel economy?

The first time I got a hire car with one it went off the road at a familiar corner, at a speed I'd done before quite comfortably. Hadn't reckoned on the tyres giving so much less grip than normal tyres.

They might save on fuel, but thats cheaper than repairs from unplanned off-road trips!

Sorry to drag this thread up from the past, but I've noticed a big hit to fuel economy since I put Goodyear F1 GSD3s on my car.

On the motorway at 60mph along with lorries I only get 48mpg, I used to be getting 60 or 65.

I know that the cold weather will have affected economy but this has to be something to do with the softer compound tyre as well.

Interestingly this has a most noticable effect on the motorway network; on normal A-B roads I've only seen a 2-3% drop rather than the much more significant drop as I've described above.

No way should there be THAT much difference :eek: With T1-R's on my vRS I still got an average 55mpg even cruising 70mph.

mmm, I wouldn't have thought it would be that different, just put the F1's on the fiat, after the no grip crappy falkens, and my fuel economy is exactly the same.....

Maybe I've got a problem somewhere then :(

I know its obvious, and I don't want to insult your intelligence, but are the pressures correct? underinflated will cause a big drag... have you checked them with an accurate gague when cold? the reading on forecourt tyre machines are notoriously bad, and will read much higher than normal as your tyes will be warm.......

most tyre places never inflate to the correct levels.....

My F1's gave about the same as the OEMS.

The only thing tyre related that has causes fuel issues for me is a massive drop in temparature and therefore tyre pressure. As mentioned get a decent gauge and check.

did anyone try the Michelin's?

I know its obvious, and I don't want to insult your intelligence, but are the pressures correct? underinflated will cause a big drag... have you checked them with an accurate gague when cold? the reading on forecourt tyre machines are notoriously bad, and will read much higher than normal as your tyes will be warm.......

most tyre places never inflate to the correct levels.....

Thanks but I check my tyre pressures every 2-3 days in the morning at around 6.30am, generally. When I checked a day or so ago the fronts were at 36psi each and the rears at 34psi. I think that that's hard enough to rule out tyre pressures as being the cause of the problem

For interests' sake, when I got the wheels & tyres back from the garage one was inflated to 22psi and the other to 42psi. Interesting!

This is using a "proper" tyre pressure gauge. I also take a second reading with a Halfords digital one (not exactly accurate, but a good indicator) and the two readings are generally within 1 psi of each other.

Good suggestion though

I do our tyres at least once a week, first thing in the morning. I add 1 psi to the recomended psi for each tyre. It seems to work for me

It's hardly a suprise that when I changed from 205/50/17 to 225/45/17 tyres my fuel consumption went up from 32 to 30 mpg.

After trying Dunlop Sports, Toyos and Kumhos I'm now running Goodyear Eagle F1s, and since I had them put on I'm only getting 28 mpg.

Now it might just be down to my driving, better weather is with us so I'm going a bit faster, or it could be down to the fact I have much more confidence cornering with my new tyres, but has anybody else noticed a significant difference in mpg between different tyre brands ?

The same happened to me. I went from 205 Contis to 225 F1 Asymmetrics and my mpg has changed by around 5mpg. I keep a petrol log - geeky I know:O - and since August when I put the tyres on this is my average increase in fuel consumption. :(

A few years ago I fitted Goodyear Eagle NCT5's to my Octavia TDI. Average consumption dropped from 55mpg to 50. I contacted Goodyear Technical Support who weren't the least bit interested. Renewed them with Vredestein and mpg back up to mid 50's. No difference in tyre size etc just make.

Nice thread revival from 2005

Nice thread revival from 2005

I know for a fact that if I'd posted and asked the question then someone would have linked to this thread and said "use the search"

Interesting thread.

I've just ordered Goodyear Eagle F1 GSD3's which are being fitted tomorrow. I am going from Bridgestone Potenza RE030 so will be interesting to see if there is a difference.

As far as checking tyre pressure goes, not one of my current tyres has changed pressure in over a year.

It's Briskoda going green and recycling old threads so people can save money due to the credit crunch. Old threads are far easier to borrow against.

I was getting 13.5 MPG in my 4.0l Jeep.

Then I checked the tyre pressures and they were way down. I got 22MPG after pumping them up!