It is Possible to Get 25 mpg in a 5th Gen
- Thread starter RichinRidgewood
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srsrogerissrs
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RichinRidgewood
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e'ff New Jersey
RichinRidgewood
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You must have a PHD in Computer Science to get a .giff to work on the 1998 vintage software they are using for this forum.
srsrogerissrs
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2021nightshade4x4
New member
Best trip average is 22-23 MPG, the “since reset” is lower, just above 18 MPG. No interstate driving yet, that’s likely why. Just 250 miles on the odometer.
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2021nightshade4x4
New member
Jersey as a whole has been going downhill since the 80’s, side effect is slightly improved mileage.
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I have 35 psig in my stock Duelers and get 21 mpg mainly driving through town to work, but if I get some highway it’ll go up to 23 for the tank. I always get better mileage than other people so I’m not really surprised I’m doing better than most.
I’d shoot for 20 and see if you can figure out how to maintain it. It’s a learned art.
I’d shoot for 20 and see if you can figure out how to maintain it. It’s a learned art.
how fast are your highway speeds
Nuke
New member
Anything over about 60 or 65mph and fuel mileage goes to crap. Steady state driving with the cruise control on relatively flat highway below 60 mph and no ac and you can easily pull off 25 mpg, at least per the on-board. Hand calculated could be a bit lower on most vehicles (very few in my experience are accurate within a few tenths of a mpg).
Most of my driving with my '19 ORP is highway and I can occasionally get 24mpg per fill-up per the on-board. Hand calculated on my '19 is typically about 1.5 mpg lower.
Most of my driving with my '19 ORP is highway and I can occasionally get 24mpg per fill-up per the on-board. Hand calculated on my '19 is typically about 1.5 mpg lower.
TrailRunnin14
New member
I’ve never seen above 20 or even close. On 265’s I was averaging around 16.5. Now on P285’s I’m close to 17. I went to a lighter tire and try to stay around 70mph.
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First Quarter Tank vs Last Quarter Tank
My computer also shows much higher mileage for the first quarter tank and then slowly drops 3+ mpg as the trip continues. I've seen 18-20 for the first 50-100 miles and eventually watch it drop down to 15-16 with generally constant speed and consistent roads. Computer seems to be pretty accurate overall, just not for short trips.
My computer also shows much higher mileage for the first quarter tank and then slowly drops 3+ mpg as the trip continues. I've seen 18-20 for the first 50-100 miles and eventually watch it drop down to 15-16 with generally constant speed and consistent roads. Computer seems to be pretty accurate overall, just not for short trips.
1000MPH
Senior Member
My on-board computer is very accurate.
Wanna know how accurate?
This is for 115k miles of mileage tracking. 395 fill-ups.
Average of computer readings (computer reset at every fill-up): 20.91mpg
Average of manually calculated readings: 20.98mpg
Total mileage/total gas: 20.97mpg
The worst differences between manually calculated and the on-board computer has been +1.57mpg and -1.46mpg
Out of 395 fill-ups, only 15 times has the difference between hand calculated and on-board computer has exceeded 1mpg.
Wanna know how accurate?
This is for 115k miles of mileage tracking. 395 fill-ups.
Average of computer readings (computer reset at every fill-up): 20.91mpg
Average of manually calculated readings: 20.98mpg
Total mileage/total gas: 20.97mpg
The worst differences between manually calculated and the on-board computer has been +1.57mpg and -1.46mpg
Out of 395 fill-ups, only 15 times has the difference between hand calculated and on-board computer has exceeded 1mpg.
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