Wacky mpg?
Hi guys, first time ever posting in one of these forms… Looking for some answers/help. Thank you in advance! Truck: 1994, Dlx, 22re, 4wd, owned for 12yrs MPG issue: I took a recent 1500 mi trip to Baja California and was getting between 18-21 MPG (with 600lbs of extra weight), now I’m getting 16 ( with no extra weight). What gives? Baja trip 1500miles: * 600lbs of extra weight (camping gear) *Tstat 180 deg (temp gauge was showing 1/4 the whole way) *new fan clutch (duralast) *fresh oil/coolant/air filter change *average speed 45-60, highway, mountainous, cold, wet *mexican gas *MPG 17.10-20.5 4wks later, w/some mods, 178miles: *0lbs extra weight *new fan clutch (Aisin) *Tstat 190 deg. OEM (single stage) (gauge reads little over 1/3) *city/highway, some mountains, cold, wet *Avg speed 50-75 *USA gas (87, little 91 mixed in for pep!) *MPG 16.41 any ideas for better mpg? thank you, B |
Stay on the highway? I can get 20 mpg or a little better just driving down the highway at the speed limit. But as soon as I throw in a little stopping, driving on city streets, etc. the MPGs plummet. I have an instantaneous MPG gauge, so I don't think I'm guessing. Wish I could give you something more useful
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My truck gets drastically different MPG city vs. highway. Like 15 MPG in town an 25 MPG on the freeway.
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Regular things to check:
:safari: |
178 miles and a single fill-up isn't really enough to accurately measure mileage. Just having the pump shut off a bit earlier (or later) can vary the computed mpg by 10% or more. Run a few more tanks, do some averaging, and see what happens.
I agree with what others have said. Pure highway miles at 65 mph or less will generally give me 2 mpg greater than a mix of city and 50 mph country driving. Also, the 600 lbs of extra weight doesn't really hurt you when cruising down the highway (unless it's on a roof rack). It's stopping and starting it in town where it makes a difference. |
Originally Posted by scope103
(Post 52417607)
Stay on the highway? I can get 20 mpg or a little better just driving down the highway at the speed limit. But as soon as I throw in a little stopping, driving on city streets, etc. the MPGs plummet. I have an instantaneous MPG gauge, so I don't think I'm guessing. Wish I could give you something more useful
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I’ll keep checking mpg. Thanks all you guys! |
Mixing 91 octane in with 87 isnt doing anything for "pep". Higher octane doesnt mean more power. All you are doing is wasting money
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Originally Posted by RJR
(Post 52417632)
...Pure highway miles at 65 mph or less will generally give me 2 mpg greater....
Originally Posted by Saltcod
(Post 52417636)
I think speed has a lot to do with it...
I think the 55mph speed limit was based upon fuel economy studies, not safety, so O.P.'s speeds in Mexico are around the more efficient range. I can feel the engine strain significantly more when I run over 65mph in fifth gear. |
I get between 220 and 250 miles per tank. Mixed. 70-80 on the highway
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