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How do I maximize Highway MPG?

Highway MPG

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69 replies to this topic

#61 OFFLINE   ptjones

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Posted 10 September 2015 - 04:58 PM

Just to be clear FORD's placard says 38psi front and back, Michelin says 51psi MAX cold.  I have been running 50psi for 80k mi. , first set lasted 64K and I'm getting great gas mileage.  I don't see a down side to this. :)

 

Paul









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#62 OFFLINE   Taz

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Posted 11 September 2015 - 05:45 PM

Under inflation is relative. Quite often car manufacturers choose a PSI level that is a compromise, like almost all other aspects of the car. Most often on a "normal" car, they bias it toward the lower end of the spectrum for better ride quality but not so low as to maybe have a significant hit on mpg.

 

Higher PSI does reduce the risk of hydroplaning. I experienced it very severely already in the car at stock tire pressures. I am currently at 48 psi  and the car has been driving great. Best mileage so far and tire wear is very good. Ride quality didn't suffer as much as i thought it might.

 

The car is a bit more nimble too which is a nice plus when trying to conserve momentum through turns. Only on a fairly rare occasion am I reminded that the pressure is higher than stock.


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#63 OFFLINE   SPL Tech

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Posted 14 September 2015 - 04:08 AM

.

 

Higher PSI does reduce the risk of hydroplaning. I

Maybe, but it also increases the risk of flying off the road in every other possible senario. You need tire contact pach area for grip in snow, wet conditions, dirt, mud, and even dry pavement. If you increase the PSI, you lose grip in all conditions except driving through standing water in a turn.


Edited by SPL Tech, 14 September 2015 - 04:09 AM.


#64 OFFLINE   fbov

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Posted 14 September 2015 - 09:29 AM

I have to disagree in the most strenuous terms. This is bunk. Back it up with some real data or delete it.

Frank


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#65 OFFLINE   ptjones

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Posted 14 September 2015 - 02:21 PM

I agree with Frank, Please supply some facts to backup your claims or Delete your Post.  There is too much misinformation out there and we don't want to get Members confused. ;)

 

Paul



#66 OFFLINE   ptjones

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Posted 05 November 2015 - 10:02 AM

I have been noticing that my HWY FE has gone up this year especially this last month. My overall average this this year seems to be 2 mpg better than last year and it looks like I'm averaging around 54 mpg HWY.  The only difference I know of is using 0-20W Mobil 1 and K&N oil filter which I can't see them making much of a difference. My tires are down to 5/32" which might make a slight improvement. :headscratch:  :detective: ;)   I haven't changed my FE driving habits. :shift: 

 

Paul 


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#67 OFFLINE   BIG ROCCO

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Posted 05 November 2015 - 05:36 PM

I have been noticing that my HWY FE has gone up this year especially this last month. My overall average this this year seems to be 2 mpg better than last year and it looks like I'm averaging around 54 mpg HWY.  The only difference I know of is using 0-20W Mobil 1 and K&N oil filter which I can't see them making much of a difference. My tires are down to 5/32" which might make a slight improvement. :headscratch:  :detective: ;)   I haven't changed my FE driving habits. :shift:

 

Paul 

The tread depth might have more of an effect than you think...???

 

http://www.tirerack.....jsp?techid=177

 

At the bottom it says:

 

Conclusion

While many of these individual differences may seem insignificant, it is easy to understand that when they are added together, the new tires may appear to reduce vehicle fuel economy. It also means that a Toyota Prius appearing to get 50.0 mpg just before replacing its worn-out tires with new tires of the same brand, type and size, might be reduced to registering just 47.25 mpg afterwards, even if all of the driving conditions were identical.


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#68 OFFLINE   ptjones

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Posted 05 November 2015 - 05:42 PM

The tread depth might have more of an effect than you think...???

 

http://www.tirerack.....jsp?techid=177

 

At the bottom it says:

 

Conclusion

While many of these individual differences may seem insignificant, it is easy to understand that when they are added together, the new tires may appear to reduce vehicle fuel economy. It also means that a Toyota Prius appearing to get 50.0 mpg just before replacing its worn-out tires with new tires of the same brand, type and size, might be reduced to registering just 47.25 mpg afterwards, even if all of the driving conditions were identical.

Interesting. :)  so much for the 47/47/47 mpg, I've blown that out of the water. :yahoo:

 

Paul



#69 OFFLINE   fbov

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Posted 06 November 2015 - 11:02 AM

The tread depth might have more of an effect than you think

+1

 

Look at LRR tire specs, and many have less tread depth than similar tires from the same maker. Our OEM's are 9.5/32, not 10/32 or more. Save a little here, a little there....

 

HAve fun,

Frankl



#70 OFFLINE   ptjones

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Posted 13 November 2015 - 04:11 PM

I have been thinking about why my FE has gone up 2mpg on the HWY and the only thing that is different is I added the NOS Octane Booster racing formula and it claims to clean injectors. A year and a half ago I used Chevron Techtron injector cleaner so I guess it's been 50K mi. approx. since I've cleaned the injectors.  Strangely enough my City FE hasn't improved noticeably. ;)  

 

PS: Just checked and Winter Blend gas get less MPG's than Summer. :drop:

 

Paul


Edited by ptjones, 13 November 2015 - 05:37 PM.







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