Pulse / Glide

[ronhowell]

Originally Posted by diamondlarry

I stayed below 40 as much as possible last month and finished off a tank this past Saturday that I started on 7/6/08. It lasted 1143.0 miles and it averaged 92.2 mpg.

That is so far removed from any other stats I have seen quoted on these boards over the years, that I find it difficult to believe. Are you sure your numbers are correct, or are these simply terminological inexactitudes!

[JimboK]

Originally Posted by ronhowell

That is so far removed from any other stats I have seen quoted on these boards over the years, that I find it difficult to believe. Are you sure your numbers are correct, or are these simply terminological inexactitudes!

Do you think he doctored his pics?

As one with 76 MPG on the current tank, with 5 pips gone after a little less than 500 miles, I believe him. I do my driving mostly in urban and suburban areas with occasional hills, whereas his is mainly on lightly traveled flat rural roads. I am confident I could come close to replicating his results if I had his driving conditions.

[diamondlarry]

Originally Posted by ronhowell

That is so far removed from any other stats I have seen quoted on these boards over the years, that I find it difficult to believe. Are you sure your numbers are correct, or are these simply terminological inexactitudes!

As Jim said, see pics above.

[dwreed3rd]

Thanks 9G-Man! I've read abount this so many times I had sworn to wait til we have our Prius before reading about P&G again. But I just read your post. I have to be honest, I'm not sure if it's just starting to sink in, or it's your explanation, but I'm beginning to understand and it's starting to make sense. One of my handicaps is that I'm reluctant to try or keep doing something if I can't understand why or how it works. It's similar to the technique, re: OD, that I stumbled onto using my SGII on our Avalon that has resulted in a ~10% improvement in mpg. I doubt most people are aware of it and most probably don't understand it, so, few replies.

[ronhowell]

Originally Posted by diamondlarry

I stayed below 40 as much as possible last month and finished off a tank this past Saturday that I started on 7/6/08. It lasted 1143.0 miles and it averaged 92.2 mpg.

So that means that you consumed 1143/92.2 = 12.4 USG of fuel. But the Prius gas tank, by all accounts holds only 10.0 - 11.0 USG at best, despite being rated by the Owners manual at 11.9 USG.

How do you explain that?

[diamondlarry]

Originally Posted by ronhowell

So that means that you consumed 1143/92.2 = 12.4 USG of fuel. But the Prius gas tank, by all accounts holds only 10.0 - 11.0 USG at best, despite being rated by the Owners manual at 11.9 USG.

How do you explain that?

This is the 4th time I have put over 12 gallons in my car. Here is the receipt from the pump when I filled it last.

How do you explain this?

The Prius will hold more than 10 gallons and will easily hold the full rated capacity. If you want to talk to our own FireEngineer(Wayne Mitchell), he will tell you that a Prius tank can be stuffed to ~13 gallons or more if done properly. I don't reccomend stuffing a tank but, I do know how to do it and have done it for the whole 22K+ miles I've had the car. Just because something isn't believed doesn't make it untrue.

[diamondlarry]

oops. duplicate post.

[ronhowell]

Originally Posted by diamondlarry

This is the 4th time I have put over 12 gallons in my car. Here is the receipt from the pump when I filled it last.

How do you explain this?

The Prius will hold more than 10 gallons and will easily hold the full rated capacity. If you want to talk to our own FireEngineer(Wayne Mitchell), he will tell you that a Prius tank can be stuffed to ~13 gallons or more if done properly. I don't reccomend stuffing a tank but, I do know how to do it and have done it for the whole 22K+ miles I've had the car. Just because something isn't believed doesn't make it untrue.

So how do you stuff 13.0 gallons into a tank with a maximum rated capacity of 11.9 gallons? Do you remove the metal tank exterior and just expand the bladder container!? Or just remove the bladder? o

Seriously, the most I have put into my Prius tank is 11.12 USG; that after driving with a single bar blinking for around 5 miles. Not that I would advise doing that, but I wanted to make the Costco in Stockton where gas is usually cheapest.

I would certainly like to know how to you get more capacity without compromising the emissions controls.

[diamondlarry]

Originally Posted by ronhowell

So that means that you consumed 1143/92.2 = 12.4 USG of fuel. But the Prius gas tank, by all accounts holds only 10.0 - 11.0 USG at best, despite being rated by the Owners manual at 11.9 USG.

How do you explain that?

Originally Posted by ronhowell

So how do you stuff 13.0 gallons into a tank with a maximum rated capacity of 11.9 gallons? Do you remove the metal tank exterior and just expand the bladder container!? Or just remove the bladder? o

Seriously, the most I have put into my Prius tank is 11.12 USG; that after driving with a single bar blinking for around 5 miles. Not that I would advise doing that, but I wanted to make the Costco in Stockton where gas is usually cheapest.

I would certainly like to know how to you get more capacity without compromising the emissions controls.

You can get that much into a tank with that rated capacity the same way you can get more than rated capacity in just about any vehicle tank. There is room for expansion of the bladder inside the steel tank. This would not be possible during the winter when the temps would cause the bladder to contract. And, speaking of blinking pips, my pip was blinking for just over 150 miles this time. As for stuffing the tank without damaging the emissions controls, there is room for some expansion before damage would occur. Granted, on a Prius, there isn't as much as other cars. I believe that as long as you don't cram the tank full and go park it in the sun for the rest of the day without driving more than a mile or two that there won't be any damage done. As I already mentioned, I have over 22K miles with no codes/problems. I also live ~14 miles from the station I fill up at.

[Pegasus_]

Wow, that's nuts.

I average 53MPG on the highway, more with hills. This using the "lifting" technique: I gently accelerate to speed, then lift off the accel pedal a bit at speed for a boost in economy while maintaining speed.

I can't seem to get P&G right though on the highway. Every time I try, my average creeps down rather quickly. I don't have a ScanGauge or anything so I can't tell where the engine's most efficient RPM is without knowing what it's supposed to sound like.

Any pointers?