View Full Version : Hypermiling in a Prius
10-22-2006, 09:49 PM
First, what a great website. Secondly, I own a 2006 prius with 2300 miles on it. I am currently at 601 miles at 74.4 mpg on the MFD. I am running conventional oil at the full mark, 50/48 PSI, and I have okay ambient temps of about 70F. After a bit of reading on cleanmpg, GH, priuschat, and priusonline I believe there are members on this site that did the 1400 miles to a tank with a prius. On several different days, I have acheived 30 minute segments at about 100 mpg. Being that I am learning, I do not have enough experience and have not spent much time to drive a hundred miles or so to get a calculated segment of greater than 100 mpg (not yet at least). I have a good suburban route that is often plauged with lights and traffic that I avoid, hence the higher MPG numbers.
I am not complaining, but is 100-110 MPG about it for a new stock Prius with a new driver? I obviously have been using the P&G technique between 30-36 mph with about a 30 impg on the MFD during my pulses. I generally don't have any regen cars on the consumption screen either. It is a shame that I made such improvements during this tank as I was planning for an 800 mpg tank; I could have hit 900 miles had I started with the success that I have been having lately. High FE has actually become quite obsessive lately. I would like to belive that once I hit the holy grail of 1000 miles to a tank, that I will fill up at 1/4 of a tank remaining rather than sweating when the pip has been blinking at me for 80 miles.
I guess in time, I will learn more from reading and doing, my car will break in, I might use higher tire pressure, I will go to synthetic oil, and I will try to lose weight :D .
Thanks for listening,
10-22-2006, 10:11 PM
Welcome to CleanMPG and thank you for the kind words
74.4mpg ain't bad at all!
10-22-2006, 10:16 PM
I believe they ran for 6 hours on the flashing empty light. You rank up there with some of the best. Very few people get 100mpg in a Prius. You will probably get a little bump in FE in a few thousand more miles.
I think if you can keep up your numbers you might get a call when they need another driver for a marathon ;)
10-22-2006, 10:23 PM
Thank you for your responses. Is posting tank results bragging or being smug?
I realize others are forced to take the freeway with their Prius' and cannot acheive high FE based on their routes. I just don't want to rub it into their faces.
10-22-2006, 10:29 PM
We encourage posting tank results on the database.
As we say in Texas - "If it's true - it ain't bragging" ;)
10-22-2006, 10:36 PM
Depends on who you are. For most of us we post them so we can compare our personal results. We also talk about what we get so we can share the excitement or gain encouragement when things aren't going so well.
10-26-2006, 09:03 PM
Great job. The best tank I have managed is 83.7 MPG for 600 miles or so, after a few months of working on my P&G technique. I have managed a couple of round trip segments of 48 miles at 103 MPG, if you can get 110 you are doing very well and 120 is for the "real" hypermilers. Keep up the good work, maybe try 58/56 psi, the ride is rough, but I tried it for a while and have backed off to 50/48 so my fillings wouldn't fall out :). I think as your car breaks in your mileage will improve further and try 0/20W Mobil 1 and fill a 1/2 quart below full. Keep us updated, I love to see the great Prius tanks, my results will be going way down soon as winter approaches here in Maine and I struggle to keep my tanks in the 50s.
10-27-2006, 02:48 AM
try 0/20W Mobil 1 and fill a 1/2 quart below full. Keep us updated, I love to see the great Prius tanks, my results will be going way down soon as winter approaches here in Maine and I struggle to keep my tanks in the 50s.
hm... isn't the prius more sensitive to oil refills? Can I really get away with 0-20W? even though the car required 5-30 to be happy? although the Mobil 1 oil i have says (for 5-20 cars) the prius's engine has a mind of its own.... does any other prius user uses 0-20 and has done an oil anaysis?
___Many Prius II drivers (don’t know about Prius I driver’s?) use Mobil1 0W-20. As for Oil analysis, haven’t seen one from a Prius using 0W-20 specifically but knowing how superior Mobil1 0W- or 5W- is over everything else, I would have swapped your fill to Mobil1 0W-20 before I had 2 miles on her.
10-27-2006, 08:44 AM
On PriusChat a driver from Winnipeg, MB with a 2004 Prius used Mobil1 0W20 last winter. After 9,600km the oil tested as almost new;
Fuel Residue: 0.0
Glycol Residue: 0.0
Moisture Residue: 0.1
The oil could have gone to 16,000km easy, like the European Prius schedule.
10-27-2006, 09:04 AM
I see you hanging tough with a 66.3 average. I strive to get great tanks like that next summer. Good job. Maybe my temperate climate in Virginia will let me sneak out some high 60's tanks. Let's go for a 900 miler.
___Now that is service! Thanks for posting the analysis and I bet Phil will swap out current to 0W-20 before the weekend is out ;)
___Good Luck and thank you.
10-27-2006, 09:49 PM
I believe that Dan K (of Prius Marathon fame) has also used 0/20 Mobil 1 in his Prius II and extends his intervals to 12000 miles if I remember correctly. I don't know if he has done an analysis to come up with the interval. I plan to extend my change intervals now that I am approaching the end of the power train warranty and will do a few oil analyses, I will post the results as I get them for those interested.
I have played around a bit with pulse and glide and I think a slightly harder acceleration of about 25 iMPG gets a little better result and where possible extend your range from 25-40 MPH, when this is impossible because of traffic 33-40 MPH also works well. I think Wayne prefers a slower acceleration than this, anyway try different rates to see what works for you, and keep up the great tanks.
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