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  1. I am currently searching for my "escape". Hopefully, a Toyota. I had a Toyota Chinook back in the 80's and loved it, and it seems times have changed. I'm still looking for another Toyota that gets good MPG (no, really), has a little room and a stove for coffee. I am open to any suggestions on models, makes....
  2. Does anyone have any figures or experience with the effect of additional weight on fuel mileage? I'm trying to figure out if a recent loss of a couple of mpg could be due to weight added (water, food, equipment, etc) or whether I need to hunt down a possible engine issue. Not burning oil, no suspicious sounds, but earlier in our four month trip we were getting 18-19 mpg, now we're getting 16-17. We have added "stuff" along the way, maybe 2-300 lbs worth.
  3. Hello. I'm a new member, though I have been a lurker for some time. I am also a member of Ecomodder, and I've used many ideas from there and elsewhere to improve my fuel economy in my '92 Itasca Spirit 21'. I'll preface this by acknowledging that some of my techniques are unorthodox, and some of you may not believe me. I travel quite a lot in this rig, and I generally get well over 18 mpg, usually in the neighborhood of 20. My one tank best is 26.2 (flat ground with stiff tailwind). I have done aeromods like air dams and side skirts as well as lightening where it fits our style of traveling. I use the usual rolling resistance tricks like keeping the tires at max (64 psi), and using all synthetic lubricants. But by far the best thing I've done is to install a mileage computer called an MPGuino that works with fuel-injected pre-OBD-II vehicles. Here's the URL: http://ecomodder.com/wiki/index.php/MPGuino It can simultaneously give instantaneous mileage, cumulative mileage, gallons per hour and actual speed (or other parameters that you can specify). The main thing this does is give me real-time feedback on what works and what doesn't to improve mpg. It has changed my driving habits, and brought my mileage from the typical 13 to 15 to where it is now. My rig is a 3.0 V-6 with automatic. I have found that using my highest gear whenever possible (overdrive with converter locked) will always get me the best mileage. With the accelerator down as far as possible without kickdown at cruising speed will get me about 13.4 mpg at an elevation of less than 1000 feet above sea level. It goes UP as elevations increase. As soon as kickdown occurs, mileage drops to around 9. It is very difficult to get much more than about 13 on flat ground (no tail wind) unless in O/D. I have had no problems with overheating the engine or transmission doing it this way, for tens of thousands of miles. I found a Master's thesis online regarding aerodynamics of big rigs, that uses fluid dynamics and wind tunnel testing to prove the usefulness of many aeromods. Link: http://publications.lib.chalmers.se/records/fulltext/133659.pdf Some of you may know that many EFI engines have a fuel cutoff so that when in gear and off throttle the fuel stops flowing, and you get infinitely high fuel mileage during this time. This is averaged into your mpg, obviously. The MPGuino will help you use this feature to best effect. There are also some non-intuitive techniques for acceleration to speed and such that I can talk about if anyone's interested. If any of you decide to get an MPGuino I may be able to give some tips for installation and calibration. I have found that slip-streaming trucks doesn't help mileage enough (if at all) to make the dangers worth it. I also drive slower than most of you could tolerate; usually between 47 and 53 mph. Happy travels!
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