acdii Report post Posted December 17, 2012 No, you pretty much have it. 235-50-18 is the Michelin, and is slightly larger than the Goodyear, which equates to 2 MPH more. The car would need to be recalibrated provided the tire clears the wheel wells. The OEM 17's are 235 50 17's, 1 inch difference, From what I can tell, the 17 vs 18 OEM is .24. so the Michelin would be about 3/4" larger. Quote Share this post Link to post Share on other sites
B25Nut Report post Posted December 18, 2012 acdii, You're going to all the trouble to get new wheels & tires so that you can get maybe 2 more mpg? 36 is not poor mpg. Those getting in the mid to high 40s are saying their trips are done at under 60 mph. Our locations dictate that we can't (or won't) do that. Wait until the weather is warmer before doing anything radical. Quote Share this post Link to post Share on other sites
acdii Report post Posted December 18, 2012 try 5 MPG. I did some driving today for work that would have easily netted 45-50 MPG in my 2010, but came up 5 MPG short in the new car. Just to confirm this car slows down quickly on its own, I had my wife follow in the 2010, she had to ride the brake when I took my foot off the gas so she wouldn't run into me. In fact driving my old car home I darn near missed my turn because I got so used to the new one slowing so fast with barely touching the brake, that the old one just didnt slow down as I expected it to. The new car slows down on its own about the same rate as me lightly riding the brake to get the regen circle going, there really is no perceptible change between coasting and braking. Also keep in mind, I drive the same trip everyday so I know what my MPG will be on any given day in the 2010, and when I cant even achieve that in the new car, well, something is wrong, and it isnt a mere 2 MPG, its at least 5. I should be getting 43 highway, given the fact the car is new, and the drop in MPG due to the temps, so a 4 MPG drop from 47 is what I expect to see, and what others are seeing, instead I see 38, now this is 38 via the dash display, when you look at the actual gallons used vs miles it is even lower. In any case it is in the shop now, so hopefully they can find a reason for the poor FE. Quote Share this post Link to post Share on other sites
salprint Report post Posted December 18, 2012 My 46.7 average is with standard 17" wheels and Michilins.Ditto Quote Share this post Link to post Share on other sites
coach81 Report post Posted December 18, 2012 Ditto So Sal and Dee you guys are getting close to the advertised 47 mpg?? Is it only Acdii with the big problems? Quote Share this post Link to post Share on other sites
B25Nut Report post Posted December 18, 2012 We have to wait and see why Acdii's slows down so much when coasting (when mine and other's don't) before we can conclude how much tires affect MPG. I think that this drag is 90% of Acdii's problem, and his dealer needs to fix it. Quote Share this post Link to post Share on other sites
Ric Report post Posted December 19, 2012 Update: Today we took a short trip. Tried and did everything to improve the MPG. At the end it was 47.3 MPG. All driving was under 55 MPH. I admit, I would not drive that way everyday. Riding on OEM 18" Goodyear Eagle LS-2 tires. We stopped at the dealership, found out they will update the MFT without any charge. Were making an appointment to update to 3.5.1. The new A4 NAV card is included free, and they have it in stock. Quote Share this post Link to post Share on other sites
jeff_h Report post Posted December 19, 2012 At the end it was 47.3 MPG. Riding on OEM 18" Goodyear Eagle LS-2 tires. Thanks for the update, about what was the outside temperature? Quote Share this post Link to post Share on other sites
Ric Report post Posted December 19, 2012 The temp was 32 degrees. Very pleased with the results. Quote Share this post Link to post Share on other sites
jeff_h Report post Posted December 19, 2012 The temp was 32 degrees. Very pleased with the results. Well that's good to hear that the MPG was good, and while it's not realistic for most to drive 55 or under all the time (I set my cruise on 70), nice to see that the results were good. Quote Share this post Link to post Share on other sites
rfruth Report post Posted December 19, 2012 Are the 18" non LRR tires but the 17's are LRR (on the 2013 Fusion SE hybrid - could a person get the 18 inch tires and keep a close watch on PSI and expect good MPG ((45 city))) ? signed potential 2013 appearance + tech FFH SE buyer Quote Share this post Link to post Share on other sites
jeff_h Report post Posted December 19, 2012 Are the 18" non LRR tires but the 17's are LRR (on the 2013 Fusion SE hybrid - could a person get the 18 inch tires and keep a close watch on PSI and expect good MPG ((45 city))) ? signed potential 2013 appearance + tech FFH SE buyer Hopefully I will be able to tell you in a couple months... door sticker will probably say 32-25 psi but I'm setting all of them at 40 as I did with the Prius and with this Fusion, hasn't made a huge difference for me, maybe 1-2 MPG, but driving 3-3.5k per month I'll take it. Quote Share this post Link to post Share on other sites
acdii Report post Posted December 19, 2012 The Service Manager is taking my car home, he lives 45 minutes away from the shop, so he should have a good road test. It will be a mix of rural and highway too. I had put 45 PSI in the goodyears and it actually made the MPG worse. When I reduced them to 34, which is what the sticker says, the MPG improved. Quote Share this post Link to post Share on other sites
terryb Report post Posted December 19, 2012 I feel like we're going to get over the tires as a major problem and I hope that the Acdii's problem is identified and cleared soon. I'm about ready to abandon my parking lot queen in MX and take one off the lot. Problem is it doesn't have ACC. Quote Share this post Link to post Share on other sites
acdii Report post Posted December 19, 2012 Been driving my 2010 the past 2 days, my wife had it all last week while I was out of town and she killed the MPG on it. It was down to 36.6. Temps 32 this morning, managed to get a bit over 39! Pretty sad when I can do that in a car rated 9 MPG lower than the new car, and yet have to work harder to get that in the new car on warmer days. Impatiently waiting on the test results. Quote Share this post Link to post Share on other sites
cwb1183 Report post Posted December 19, 2012 (edited) For info comparison purposes, I went to tirerack and looked up the OEM tires (according to their site) and alternates for LRR tires, but didn't see the same type of the stock 17" tire available in an 18" version (whether one would choose that on his/her own notwithstanding, this is just info for anyone who cares) --------------------------------------- OEM 17" Michelin Energy Saver A/S Passenger All-Season Size: 235/50R17 ($129ea)---------------------------------------- OEM 18" Goodyear Eagle LS-2 Grand Touring All-Season Size: 235/45R18 ($108ea) Alternate LRR tires for 18":Continental PureContact with EcoPlus Technology Grand Touring All-Season Size: 235/45R18 ($169ea)Michelin Primacy MXM4 Grand Touring All-Season Size: 235/45R18 ($265/ea)Michelin Pilot Alpin PA4 Performance Winter / Snow Size: 235/45R18 ($265ea) ---------------------------------------OEM 19" Continental ContiProContact Grand Touring All-Season Size: 235/40R19 ($246ea) Alternate LRR tires for 19":Michelin Pilot Alpin PA4 N-Spec Performance Winter / Snow Size: 235/40R19 ($309ea) Personally, I had both LRR and non-LRR tires on my Prius and Fusion hybrids, would have to go back and look at specific averages during the timeframes (is noted on my fuel log when I swapped tires), but don't think it made more than a 2MPG difference, at least for me anyway. But I wonder what the difference is in wheel weight between the 17" and 18", and how much of a difference might that make? Let's say the 17" is 22lb and the 18" is 25lb, I have no idea how much difference that might cause? Note, The standard tire size on the Fusion Hybrid is 225/50/17 NOT 235/50/17. The discount tire site inaccurately list the tire as 235. Go to Fords specs on the Fusion.Go to this site and you can compare exactly what the change will do size wise. http://www.discountt...nfoTireMath.dos Fusion S - 215/60R16 95H Goodyear Assurance Fuel MaxFusion SE - 235/50R17 96H Michelin Energy Saver ASSE upgrade - 235/45R18 94V Goodyear Eagle LS2Hybrid - 225/50R17 93V Michelin Energy Saver ASHybrid upgrade - 235/45R18 94V Goodyear Eagle LS2Titanium - 235/45R18 94V Goodyear Eagle LS2Titanium upgrade - 235/40R19 96V Continental ContiProContact Edited December 19, 2012 by cwb1183 Quote Share this post Link to post Share on other sites
acdii Report post Posted December 19, 2012 thats the same tire on the 2010! I should spend the $600 and get a set of 17" rims and just put my old tires on them and get new ones for my 2010. Quote Share this post Link to post Share on other sites
Jamone Report post Posted December 31, 2012 18" Goodyears, 250 miles so far 36 MPG Quote Share this post Link to post Share on other sites
Fynack Report post Posted January 4, 2013 32-35mpg on 18" Goodyears Quote Share this post Link to post Share on other sites
Jamone Report post Posted January 4, 2013 Up to 40.4 mpg on 18" Goodyears and climbing. Quote Share this post Link to post Share on other sites
terryb Report post Posted January 4, 2013 18" Goodyears and have just under 80 personal miles added to the car.Short trips <20 miles and up to 46mpg on two trip segments. Quote Share this post Link to post Share on other sites
Allegany Report post Posted January 6, 2013 Well as I've said before I have Hankook Studded snows 225-50-r17 on all four. The weather has generally been cold and we're getting another 2" of snow as I type. The paved roads have mostly been clear except for some drifting. The dirt roads are snow covered and quite messy. Went to breakfast this morning got 55.1 on the way down the hill and 23.8 on the way home for around 39mpg. Long term mileage holding at 37mpg. Quote Share this post Link to post Share on other sites
Nmadole Report post Posted January 6, 2013 30.1 MPG 18" Goodyears http://fusionhybridmpg.blogspot.com/ Quote Share this post Link to post Share on other sites
acdii Report post Posted January 6, 2013 Well as I've said before I have Hankook Studded snows 225-50-r17 on all four. The weather has generally been cold and we're getting another 2" of snow as I type. The paved roads have mostly been clear except for some drifting. The dirt roads are snow covered and quite messy. Went to breakfast this morning got 55.1 on the way down the hill and 23.8 on the way home for around 39mpg. Long term mileage holding at 37mpg.You are doing pretty good with snow tires! Quote Share this post Link to post Share on other sites
KingJL Report post Posted January 6, 2013 17" michelins - 38.9 lifetime (and continually rising) - 870 total miles Am seeing 41 - 43 per fillup w/20 percent freeway (65 - 70), 10 percent town/city, the rest @55 or less on country/mountain roads Some stats - @~40 degrees in eastern tn (not a whole lot of level ground here): 70 mph, eco cruise seems to average ~38.7 65 mph, eco cruise seems to average ~40.5 Quote Share this post Link to post Share on other sites
