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Hybrid Vehicles Toyota Prius Toyota Prius MPG-Real World Numbers
767 messages, Last post on Sep 28, 2009 at 9:21 AM
You are in the Toyota Prius Forum. Your Host is pf_flyer
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Replying to: prius2007 (Nov 01, 2008 1:49 am) When you are driving, and you take your foot off the accelerator (coasting), the car then uses the momentum of the wheels to back-drive the electric motor, thus charging the battery. This method of charging is much more efficient than regen braking since there will not be as much energy lost due to heat being generated. Its true that gliding can help you go a little further than coasting, but gliding does nothing at all to charge the battery. What may be perceived as friction while coasting is actually the electric motor being back-driven. And yes, with any rotating part, there is friction. That's just something that cannot be avoided. You even have friction in the wheel bearings while simply gliding. I don't know. There's people that get better gas mileage than me, but I'm happy with my average of 57.5. |
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Replying to: cdhc (Nov 01, 2008 7:30 am) |
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Replying to: prius2007 (Nov 01, 2008 1:53 am) The Scangauge sounds interesting. Where would one get it, is it hard to install, and where does the unit sit int he car? Thanks for all your help and advice. I loved my Prius even with the lower mpg than I was expecting but now I love it even more knowing the reasons why I'm not getting that mpg. I'm working more on all the suggestions and this tank is showing 50 mpg. That makes me very happy. Thanks again, Jana |
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Replying to: jana6 (Nov 01, 2008 5:48 pm) I was just reading this tread over on PriusChat on SGII: link title you can also use their search function. Also on www.cleanmpg.com you'll find lots of good info on the subject. Both sites at times have a group buy or discounted price on the SGII and advertise it on the site or look in the PriusChat shop. I think the price is already discounted. The manufacturer's website is: link title One reason I got it is to monitor my water temp to feel safer when using grill block. You can also get segment MPG numbers. BTW congrats on your great MPG (WOW you got to 50) with your short trips and all. You're another proof that if people are interested it is possible despite of all the nay sayers. I'm going to read some of your prior posts to get more details of your driving profile and if possible offer you some additional tips. You got some good ones already from cdhc he knows what he is talking about  Best of luck, Gabe
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Replying to: jana6 (Nov 01, 2008 5:48 pm) For (especially) short trips an engine block heater (EBH) helps. It will improve warm up time thus the first 5 minutes MPG. This is especially useful in colder weather. They can be put on a timer an kick in say 3 hours before taking off. In colder weather lot of us use grill blocking partial to full pending how cold it is. Also have you looked in tire pressure you may want to consider it. You already talked about combining short trips - that's great too. link title has many other great info - there is a Fuel Economy forum. Good luck, Gabe |
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Replying to: prius2007 (Nov 02, 2008 4:01 am) Great! I've checked them out and have put both in my favorites. I'll have my mechanic friend check it all out for me for further guidance on the SGII. When I filled up today (less than 5 gallons actually), the actual came up to 56.57 so I probably didn't fill it up all the way because of the bladder but that sure was nice to see (the computer still said 50 which I'm happy with). Next fill up should give me a better idea of the real numbers. I live in Las Vegas so the summer heat does affect the gas mileage--sorry, must use AC! The winters are very mild but the evenings can get down into the upper 30's (usually more like the 40's though) and the days range from the 40's to the 60's. I can't say I noticed any better or worse gas mileage last winter but am now keeping track of it all so I'll have a better handle on the numbers. I'm going to get my oil changed tomorrow morning and will have them put the back tire air pressure at 40 and the front at 42. At least I think that's what it said to do. I'll double check that. I think it said the front should be 2 lbs higher than back. Again, thanks for all your help. |
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Replying to: jana6 (Nov 01, 2008 5:48 pm)
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Replying to: cdhc (Nov 07, 2008 12:12 pm) Keep up those good habits! 
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Any of you Prius owners seeing a mileage hit due to ethanol-blended fuels? A lot of folks in the The Inconvenient Truth About Ethanol discussion are reporting 7-10% mileage reductions vs regular gas. I assume this would also affect hybrids but might tend to be a bit muted because of the hybrid system.
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Replying to: pf_flyer (Nov 19, 2008 6:02 pm) My data clearly shows a decline in MPG during winter. How much of it is due to E10 vs the cold I don't know. Spring Summer Fall Winter 2007 50.4 59 57.5 55.3 2008 62.4 64.5 63.1 change 23.8% 9.3% 9.7% Gabe
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