Rich Posted February 17, 2008 Report Share Posted February 17, 2008 I don't think this has been asked before but just curious to know. Does a cars geometry have any affect on the MPG....for example if the alignment was well out of spec I assume this puts more pressure/strain on the chassis and tyres driving them harder. Quote Link to comment Share on other sites More sharing options...
Tony Posted February 17, 2008 Report Share Posted February 17, 2008 Without question the Geometry calibration effects fuel consumption, here's an example 2mm of miss-alignment on a 15" wheel drags the tyre 28ft sideways per mile Quote Link to comment Share on other sites More sharing options...
Rich Posted February 17, 2008 Author Report Share Posted February 17, 2008 Would the difference in fuel consumption change drastically? It's just that I've noticed I'm not getting as many MPG as I used to, after I lowered it and fitted the 17's. I thought it was just the wider tyres causing it but since I found out that on one side the camber is out I'm wondering if this is having an affect also? Quote Link to comment Share on other sites More sharing options...
Tango Posted February 17, 2008 Report Share Posted February 17, 2008 Would the difference in fuel consumption change drastically? It's just that I've noticed I'm not getting as many MPG as I used to, after I lowered it and fitted the 17's. I thought it was just the wider tyres causing it but since I found out that on one side the camber is out I'm wondering if this is having an affect also? More likely to be the tyre pressures??? Quote Link to comment Share on other sites More sharing options...
jon Posted February 18, 2008 Report Share Posted February 18, 2008 You'd be amazed at the difference tyres can make. I dropped at least 1mpg going from RE040s to FK452s on the 350z Quote Link to comment Share on other sites More sharing options...
Rich Posted February 18, 2008 Author Report Share Posted February 18, 2008 I check my tyres all the time, once a week if I can. I did have them on 30psi and have since increased to 32psi. I did try a higher pressure but the car handled differently, didn't feel as grippy to me, especially on the front. Jon - are you saying the brand of tyre can affect it as well? Quote Link to comment Share on other sites More sharing options...
alnug Posted February 18, 2008 Report Share Posted February 18, 2008 I had a set of toyo T1R on the car gave an average of 32.5mpg on the trip same road, PSI etc. now running Yokohama C-drive and it's shot up to 35.5mpg ..so yes brand/model can affect things just as much Quote Link to comment Share on other sites More sharing options...
jon Posted February 18, 2008 Report Share Posted February 18, 2008 What he said ^ Might have to try a set of Yokos next, though Yokohamas marketing department is really difficult to get hold of. Quote Link to comment Share on other sites More sharing options...
Rich Posted February 20, 2008 Author Report Share Posted February 20, 2008 I have the Toyo's T1-S...maybe they're me problem! They will need replacing soon and I won't be getting them again as they wear too quickly! Quote Link to comment Share on other sites More sharing options...
Tony Posted February 20, 2008 Report Share Posted February 20, 2008 I have the Toyo's T1-S...maybe they're me problem! They will need replacing soon and I won't be getting them again as they wear too quickly! The T1-S did well in Tyrereviews> http://www.tyrereviews.co.uk/Tyre/Toyo/T1S.htm Quote Link to comment Share on other sites More sharing options...
Rich Posted February 20, 2008 Author Report Share Posted February 20, 2008 I love the tyre, don't get me wrong it's the best I've ever used as I'd always been a 'budget' tyre person. However, when you only get 5000 - 6000 miles out of them it's a little dissappointing. Quote Link to comment Share on other sites More sharing options...
Tango Posted February 20, 2008 Report Share Posted February 20, 2008 I have the Toyo's T1-S...maybe they're me problem! They will need replacing soon and I won't be getting them again as they wear too quickly! The T1-S did well in Tyrereviews> http://www.tyrereviews.co.uk/Tyre/Toyo/T1S.htm They're being phased out by Toyo..gradually being replaced as they release the same sizes in the T1-R. Quote Link to comment Share on other sites More sharing options...
Tony Posted February 20, 2008 Report Share Posted February 20, 2008 I love the tyre, don't get me wrong it's the best I've ever used as I'd always been a 'budget' tyre person. However, when you only get 5000 - 6000 miles out of them it's a little dissappointing. True.... But be honest though some of the wear is due to the Geometry calibration positions. Although with the best calibration you'd be fortunate to get more than 8k Quote Link to comment Share on other sites More sharing options...
alnug Posted February 20, 2008 Report Share Posted February 20, 2008 i also think that Toyos are a good tyre for outright dry grip..but have to say it falls down on others such as comfort, uniformity as it wears, roll resistance and wear. As Tony has said you'd be lucky to get more than 8K from a set of T1-s and I got little more than 12K from my T1Rs.....and have to say after it wore half way it tramlined a bit more and was a bit more harsh and ride comfort suffered. My last set of Yokos the AVS DBs lasted 20K (the ones I have on now have an even higher wear rating so expecting longer)...and wore very well all the way till they were gone....so factoring everything together and the fact that I would have needed 2 sets of Toyos and the fact that it reduced my fuel efficiency by 10% or more I would be sticking with Yokos...i just worked out a 10% saving in petrol would save me £260 or more a year!! Quote Link to comment Share on other sites More sharing options...
Rich Posted February 20, 2008 Author Report Share Posted February 20, 2008 Well hopefully that will change soon It's a shame the Toyo's don't have the wear of the Michelin Pilot Primacy but when I had mine they tramlined badly! The Goodyear Eagle F1 look good though. Quote Link to comment Share on other sites More sharing options...
alnug Posted February 20, 2008 Report Share Posted February 20, 2008 be aware with the goodyears your MPG will be very similar to the Toyos...... Quote Link to comment Share on other sites More sharing options...
Rich Posted February 20, 2008 Author Report Share Posted February 20, 2008 So I'm assuming a tyre with a harder compound will be better to increase the MPG? Quote Link to comment Share on other sites More sharing options...
Tony Posted February 20, 2008 Report Share Posted February 20, 2008 be aware with the goodyears your MPG will be very similar to the Toyos...... I like the Goodyears (F1 GSD).... For me they are a problem free sale and well respected in Tyrereveiws Quote Link to comment Share on other sites More sharing options...
Tango Posted February 20, 2008 Report Share Posted February 20, 2008 be aware with the goodyears your MPG will be very similar to the Toyos...... I like the Goodyears (F1 GSD).... For me they are a problem free sale and well respected in Tyrereveiws My T1-R's on the Lexus 250 are wearing well....14K and loads of tread left, but then again it's on a proper RWD car Have the Toyo Proxes 4 on the IS200, and again very pleased with grip in the wet as well as dry...but bit early to tell on wear rate. Quote Link to comment Share on other sites More sharing options...
alnug Posted February 20, 2008 Report Share Posted February 20, 2008 be aware with the goodyears your MPG will be very similar to the Toyos...... I like the Goodyears (F1 GSD).... For me they are a problem free sale and well respected in Tyrereveiws Don't doubt the goodyears at all....just was saying in terms of roll resistance it could be a bit high. Quote Link to comment Share on other sites More sharing options...
Tony Posted February 21, 2008 Report Share Posted February 21, 2008 be aware with the goodyears your MPG will be very similar to the Toyos...... I like the Goodyears (F1 GSD).... For me they are a problem free sale and well respected in Tyrereveiws Don't doubt the goodyears at all....just was saying in terms of roll resistance it could be a bit high. Maybe this is because they are EL (extra load) with a reinforced sidewall. Quote Link to comment Share on other sites More sharing options...
Rich Posted February 21, 2008 Author Report Share Posted February 21, 2008 I suppose at the end of the day you get what you pay for...If you want the grip then you have to compensate on the tyre life and MPG I'm tempted to try the Goodyears, depending how much they are! I guess it will just be trial and error to see which tyre gives the best MPG on my car but that's going to prove an expensive test! Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.