ptjones Report post Posted November 16, 2018 Waldo, on 13 Nov 2018 - 11:18 AM, said: So now you're own data says that 50psi has a smaller contact patch, yet you still seem to think that 50psi has better traction. Bigger contact patch = more traction. This is a simple fact that "makes sense". Not sure why you keep wanting to ignore it, it's a fundamental scientific fact that hasn't changed in 20+ years You are contradicting yourself now, in your Post#17 you said " I don't run 24psi because the load rating would not be nearly enough, and just like overinflating, the tire doesn't perform optimally." But you just said:" Bigger contact patch =more traction" 24 psi has a bigger contact patch than 35 psi but " the tire doesn't perform optimally" So Bigger contact patch doesn't necessarily mean more traction. Maximum traction occurs when tires are "Properly inflated " as shown in example below. FFH/CMAX at 35 psi/38 psi are "Under Inflated" like the example below because using a tire tread gauge the tire edges are wearing faster than the rest of the tire. Interesting that you said you use " 35 to 40 psi" so obviously you also think the tires are Under Inflated too. Only the tires using 50 psi have even tire ware which is the definition of "Properly Inflated" as shown below. From the information we have I still go with I said before Properly Inflated will have 44 psi to 50 psi. to get even tire ware.My Ford Service Mgr. is talking to FORD to see if we can get more info on tire pressures. In the OM it tells you to look at door jam to get the minimum recommended and don't exceed the tire Manufactures max pressure on the sidewall of tire. This would imply that you can use any pressure from 35 to 51psi. The tire experts at Michelin, Tire Rack and Discount Tire all agree with this statement. This is my Michelin Energy Saver AS using 50 psi since new with 80k miles on it and now has 85k miles going for 90K miles. As you can see it has even tire ware, definitely not Over Inflated. Paul Quote Share this post Link to post Share on other sites
ptjones Report post Posted November 17, 2018 Another advantage of 50 psi it raises the ground clearance by 1/4" when measuring from the rim edge to the road. 38 psi gives you 1/10 of an inch more than 35 psi. Something to think about. :) Paul Quote Share this post Link to post Share on other sites
ethermion Report post Posted November 18, 2018 Nuts. Do not drink that Kool-aid. To all normal people here, open the driver's door, check the sticker, and inflate as indicated. People who are 100000x more smart on this issue made the sticker. Trust 'em. There is no special place in heaven for folks who saved a few MPGs, but arrive EARLY. Quote Share this post Link to post Share on other sites
ptjones Report post Posted November 18, 2018 (edited) Nuts. Do not drink that Kool-aid. To all normal people here, open the driver's door, check the sticker, and inflate as indicated. And all the "Real Experts" that Make, Test and Sell the tires say that is a minimum pressure and FORD says in the OM not to exceed the Max pressure located on the sidewall of tire which is 51 psi on Michelin Energi Saver so it sounds like FORD is OK with any pressure from 35 psi to 51 psi. Read your OM. People who are 100000x more smart on this issue made the sticker. Trust 'em. And this is a Ridiculous Statement. Where's the Proof? This is totally Misinformation and you haven't shown any documentation to back this up. POST# 26 is Pure Science and has documentation to back it up. We are looking for facts, not opinions. :) There is no special place in heaven for folks who saved a few MPGs, but arrive EARL And how would know ? I think you have been drinking a few to many Beers and are confused. :) In the endless quest of separating Facts From So Much Misinformation. :) Paul Edited November 18, 2018 by ptjones Quote Share this post Link to post Share on other sites
Waldo Report post Posted November 19, 2018 Another advantage of 50 psi it raises the ground clearance by 1/4" when measuring from the rim edge to the road. 38 psi gives you 1/10 of an inch more than 35 psi. Something to think about. :) Paul Raising the ground clearance has a negative effect on aero, which is a bad thing for fuel economy. Quote Share this post Link to post Share on other sites
ptjones Report post Posted November 19, 2018 Raising the ground clearance has a negative effect on aero, which is a bad thing for fuel economy.A 1/4 of an inch? not measurable difference in mpg's. 2014 I made 2.5" chin spoiler attached with Velcro, didn't see any improvement and dragged on a lot of driveways. Not all ideas are good ones. ;( Quote Share this post Link to post Share on other sites
Waldo Report post Posted November 20, 2018 A 1/4 of an inch? not measurable difference in mpg's. 2014 I made 2.5" chin spoiler attached with Velcro, didn't see any improvement and dragged on a lot of driveways. Not all ideas are good ones. ;( Good grief I thought you wanted to be scientific. Nothing you've ever done is measurable scientifically. I know of several Ford programs where the ride height has been lowered by 10mm on some versions of the vehicle specifically for fuel economy. 1/4in is absolutely measurable in a proper wind tunnel and over the lifetime of a vehicle it will make a difference in fuel consumed. I will guesstimate though that it would not be a big enough difference to offset the benefit of the reduced rolling resistance. Quote Share this post Link to post Share on other sites
ptjones Report post Posted November 20, 2018 Good grief I thought you wanted to be scientific. Nothing you've ever done is measurable scientifically. I know of several Ford programs where the ride height has been lowered by 10mm on some versions of the vehicle specifically for fuel economy. 1/4in is absolutely measurable in a proper wind tunnel and over the lifetime of a vehicle it will make a difference in fuel consumed. I will guesstimate though that it would not be a big enough difference to offset the benefit of the reduced rolling resistance.And I think all my testing has been Scientific with what I have to work with. I install something and then monitor my MPG's. Back in 2013-14 many CMAXers did alot of Aerodynamic testing from spoilers,air dams on the sides, more undercarriage covers, GasPods, rear window deflectors and on and on with even putting yarn on the body of the car to watch air flow. What I ended up with were the only workable solutions that I could come up with. Grill Covers and wheel covers and rear wheel well covers are worth 6 mpg., 50 psi .5 mpg, Premium 2 mpgThe car is to low to add anything on the bottom without it being destroyed right away. I'm currently replacing my ICE bottom cover from dragging on things so many times over 6 yrs. I'm positive that having the the extra 1/4" made some difference on hitting things on the road and parking lots. :) Paul Paul Quote Share this post Link to post Share on other sites
ptjones Report post Posted November 25, 2018 Interesting another data point, My 2016 F150 4X4 2.7L EOB has 28k miles, 265/60-18" tires and FORD recommended pressure is 35 psi, Max pressure of 51 psi. I have running 50 psi about half of the time. Every time I get an oil change at FORD they lower pressure to 35 psi again and forget to raise them backup for awhile. I have 8/32's on the edges and 9/32's in the center, sound familiar it looks like FORD under inflates tires on trucks too. Paul Quote Share this post Link to post Share on other sites
2014FordFusionSE Report post Posted January 10, 2019 My FORD Dealer can get Michelin Energy Savers set of four for $730 out the door and then add in $70 MasterCard rebate from Michelin takes it down to $660 which is a real good deal, but it is over Sept. 20 I have 78k mi. on my Michelin's, but I think I can go to 85k mi. before I need to change. I'm going to buy them now, but wait to change them till I need too. Normally it is a real good idea to have the alignment done to, but I'm getting such good wear I don't think the Dealer can do better. I picked up the tires today and it came to $730.17 Total. I applied for a rebate at FordOwner.com and was notetied that I would get my $70 rebate in 6-8 weeks. Paul Back to the original topic :) Costco currently has a $70 rebate on Michelins + 1c installation which results in a $129 discount.Also, Discount Tire (or America's Tire) will match the deal. A win-win deal to replace your tires. I plan to get Michelin Pilot Sport A/S 3+ and try them out.(Disclaimer: I don't work for any tire shops :)) Quote Share this post Link to post Share on other sites
ptjones Report post Posted January 10, 2019 Back to the original topic :) Costco currently has a $70 rebate on Michelins + 1c installation which results in a $129 discount.Also, Discount Tire (or America's Tire) will match the deal. A win-win deal to replace your tires. I plan to get Michelin Pilot Sport A/S 3+ and try them out.(Disclaimer: I don't work for any tire shops :))It will be interesting to see what happens to your gas mileage and please post it here so others will know. :) Paul Quote Share this post Link to post Share on other sites
i.Love.my.fusion Report post Posted June 27, 2019 Back to the original topic :) Costco currently has a $70 rebate on Michelins + 1c installation which results in a $129 discount.Also, Discount Tire (or America's Tire) will match the deal. A win-win deal to replace your tires. I plan to get Michelin Pilot Sport A/S 3+ and try them out.(Disclaimer: I don't work for any tire shops :)) Hi, Any update to how those tires are doing compared to your originals? I'm trying to decide on going with the energy savers or something else. My Costco here has the energy savers for $883 out the door ($203 per tire).They're doing a similar sale as what you posted. Except this one is for Bridgestone tires. So that means I can't get the energy savers on sale. Does anyone have any recommendations for good Bridgestone tires for the fusion hybrid? Quote Share this post Link to post Share on other sites
2014FordFusionSE Report post Posted June 28, 2019 The tires are really good so far but mileage hovers between 37 and 38 mpg. I used to get 42 to 43 mpg (based on the built-in gauge). I reset it when I switched tires and I reset it once every few months. The grip is excellent and I've had no issues with them. I don't drive too much though but so far, everything has been great. Quote Share this post Link to post Share on other sites
ptjones Report post Posted June 29, 2019 I would go to your FORD Dealer and so if they can beat the price on Energy Savers, mine did and I got the rebate. Paul Quote Share this post Link to post Share on other sites