I am curious if anyone with a gen5 prime has driven it (in HV mode) beyond "zero" HV miles remaining. If yes, how far were you able to drive on gasoline before the car shut down the ICE and started running on EV mode? Also, in what conditions did you do this? City driving, highway driving, or? Was it an SE or XSE? (asking because the different wheels/tires affect fuel economy)
Mine will give a warning at 40 kms (25 MI) remaining, and then the engine quits about 40 kms after that.
I am confused, so for a gen 5 prius prime/phev, the engine quits at zero km remaining, as shown on the display?
No. You've got at least 1gal left at 0 mi, maybe more. I know I've done 30mi after zero, maybe as much as 40. I've never driven until the engine died. When I get to 0 miles remaining, it normally takes 8.5-8.8 gal of fuel to get back to full. My tank(HEV AWD) is supposed to be 10.6 gal(same as Prime), so the reserve might be as much as 2 gal. And, of course, miles available will depend driving conditions. 1.5 gal at 85mph gives you about 55mi. 1.5gal at 50mph gives you about 90mi.
Good info, thanks. Do you know if the gen5 PHEV fuel tank is the same shape as the gen5 HEV AWD? (asking because the shape of the tank affects the quantity of unusable fuel in the tank) Has anyone here ever posted about driving a gen5 PHEV all the way to empty, i.e., until the ICE actually quits?
It'll be wise to do your own experimentation, than rely on the cloud for that sort of specific information. I know that I can get at least 50 miles beyond the zero miles to empty in both my old Prius C and Prime. I had more options in my Prime, since I can do additional miles in EV mode alone. I wouldn't recommend doing this too often, since the fuel pump relies on the fuel in the tank to cool the motor. Good Luck.....
Thanks, I might. But if several others have done this (with a gen5 prime/phev) and they have some range numbers to when the stops, this info can at least give me a rough estimate of what might typically be possible, at least in some conditions.
The problem is that you don't know how rigorous their scientific method is and how they normally drive and under what conditions. That's why results vary. I figure 50 miles beyond zero is good enough for me and has a margin of safety I'm comfortable with. I recall on one of my cars, the odometer options became non-functional and was locked to LOW FUEL - was several miles beyond zero miles to empty. Everything else in my cluster was working, but couldn't determine how much further I could go - even if I had the distance to the nearest gas station. Fuel needle was on E and had been there for a while. YMMV
They're different shapes, but I don't know how much that affects usable fuel. The PHEV tank is more of a mild saddle-style than the HEV tanks, if that means anything. FWD HEV: https://toyota-img.amayama.com/imgus24/A1/776182A.png AWD HEV: https://toyota-img.amayama.com/imgus24/A1/776184B.png PHEV: https://toyota-img.amayama.com/imgus24/A1/776183.png
Agreed. But I was curious if there was already a thread on this with maybe some folks posting how they tested this, and what their results were with a gen5 phev.
Thanks again, those images are interesting. Looks like the AWD and FWD fuel tanks have very similar shapes, with the PHEV being definitely different. Do you know if all of the gen5 tanks (in the usa) have the same rated/claimed total size?
Some did early on, but the thread died off quite awhile ago. I think the final consensus was something like: 1. Assume 1gal reserve. 2. Check your tank average when you reach 0 miles. 3. That's roughly what miles you've got left(including a small safety margin).
The FWD HEV is a little bigger than the rest. 11.3 gal versus the 10.6 gal versions in the AWD HEV and PHEV.
