Maxed out my own efforts, what is next?

Make sure you watch this one too. Works for low speed driving and minor hills.​

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When you get around to it get a set of Energy Saver A/S tires. Most of us see a 2mpg-3mpg improvement over OE tires.Remember that low speed driving is all about reducing rolling resistance so tires and inflation pressure is very important. Make sure you are gliding as much as possible and in open loop. I found that if I don't lift off the throttle completely before starting a glide I may not get into open loop quickly or even at all.​

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You could also look into a engine block heater and grille blocking for colder months.​

 

The tires that came on your car are LRR. Inflating them to the pressure marked on the sidewall (probably 44psi) cold (e.g., before driving in the morning) will probably help. Use an accurate pressure gauge to do this: a dial or a digital one, they aren't that expensive.

Not sure what you mean by annoying other drivers. If driving the speed limit annoys them, that's too bad - or if it's a multilane roadway they can move to the left and go around you. There's a narrow winding 2-lane road near my place that runs along the river. Lots of blind turns, bicyclists, driveways, runners/pedestrians, etc. Speed limit is 25mph. Folks like to whiz along at 40-ish on it (often juggling their handheld cell phones) and come sailing up behind me. Sorry, I'm not going to risk flattening a bicyclist just to keep a speeder happy.

Try focusing on identifying periods when there is no traffic behind you and then slowing below the speed limit if that will help. Ease up to the limit if traffic appears behind you.

Can you offset your schedule a tad if that will improve the traffic situation?

7 miles is tough, flat or hilly, because the car is warming up during a large portion of the trip. A block heater might help. If you can combine errands with your commute that will be overall more efficient.

Others here may have additional ideas.

P.S. Get a Scangauge 2. That will give you a better idea what is going on with the car.

 

Insight-I Owner just made me think of an idea.

Try picking apart your total commute. Print out a map of it from Google Maps. then for each hill or other challenging section try to identify the reason you are having a hard time with maxing mpg. Is it elevation change? Traffic? etc.. Then when you approach that section of road reset your trip meter and make adjustments to your driving technique and mentally record the mpg and the technique, speed etc. for that section. When you get to work or home add those details to the map. Do this for each section or road and then combine the adaptations to your total commute and see if it helps your overall numbers.

 

This is absolutely a great idea. Not only does it help you on your commute, but it also teaches you how to deal with similar situations you encounter on other trips.

I did something similar on my commute and it helped tremendously.

An extra benefit was that it changed my commute from a dull boring chore into an interesting game that I actually looked forward to.

 

Your mileage isn't bad for the type of commute you drive. If you want much better, you need a PHEV or EV.

Tom

 

Or a bicycle.

 

This type of driving is the reason people discriminate against Prius drivers.

Try this in LA and see what happens.

I would rather get 50 MPGs and not worry about someone following me or shooting at me.

Courtesy goes a long way.

 

Then we would miss out on your super helpful posts like the one above!

 

I would do all the above and make sure I drove uphill in ECO mode and only used enough gas to keep the eco light on, unless it held up traffic. The prius works well starting out at the bottom of a hill and climbing it first then descending - I can usually get 64 mpg doing that, even with a cold start. But you start up at the top and waste the gas going down while the engine warms up before it allows no gas coasting. Thats tough. The PIP will let you do that and it seems like the hatchback should also, but it does not. All because it is programmed to let you have a warmed up ICE and CAT when you need it. Even trying to coast engine off in neutral will bring on the ICE as you start downhill. The only way around this, is going to be some kind of defeat switch that locks the ICE out and allows a coast. Maybe someone here has figured out how to do that - Bob Wilson or Ken in Japan. I am sure it would void the warranty as well.....

 

Is this something new with the Gen III? With the Gen II HSD, the ICE cannot start in N no matter what the conditions. If it is running when you shift to N it keeps running. If it isn't running, it can't start.

This is the reason people warn against coasting down large hills in N. If you shift into N with the ICE off, you can theoretically over-speed MG1 as the motion of the wheels forces it to spin too fast. In normal operation the ICE starts to turn to limit MG1's speed, but it can't do this in N.

Tom

 

In PWR mode I can get 45mpg or better with my hills and valleys on my drive. 50 feet of full power mode going uphill, will take about 12 miles of 99% electric to recover back to 50mpg on CONs. I'd rather have that power up a hill at 60-70mpg than putt along at 42 to make up the mpg, in the long run, its the price I pay at the pump that I look at. getting 45-47mph I'm fine with.

 

Nice work, Brett!

The only concern I have with neutral is whether or not it kills fuel consumption completely like warp stealth or glides do. In the GenII I could warp stealth down a long hill at infinite mpg but if I shifted to neutral I could only get 350mpg. I suspect this is a result of the ICE being on when i shifted to neutral. I will check to see if this is the case with the GenIII on my next commute. I'll verify using the scan gauge and looking at open vs. closed loop.

 

Make sure you don't start off in neutral below 42mph? Then accelerate higher than 42mph?. It is ok if you shift into neutral at speeds over 42mph and coast down.

 

Supposedly. I've never heard of a failure but that is what Tom and Seilerts say and I believe them. LOL