Urgent advice needed from PriusChat - should I fill up or not?

You have an excellent point, but I had a secondary goal as well, to see what the usable tank capacity is, and putting a gallon in would have obviated that goal.

I can now clearly say that my car has a 10 gallon usable range, and that tip of multiplying the indicated MPG by 10 is a good rule of thumb. Even though the Cons gauge in my car reads 5% aggressive, like it seems everyone's does, I have I'm sure an excess gallon of usable fuel in my tank when I use 10 as my usable fuel.

I may, however, use your thought when I go for the 600 mile tank (which I just might do now, I am holding at 60 mpg through 100 miles using the tips...)

Hmmmm wait a minute...would putting a spare gallon in the tank mean I cheated when accomplishing the 600 mile tank?

What are the rules here on high mileage tanks?

I will tell you it is a hotly debated thing in the Vette 1/4 mile world...if someone has Nitrous on their car and they try to turn in a record time N/A, they get all sorts of trouble unless there is a trusted member willing to vouch that the bottle wasn't in the car...no cheating and it's too tempting to hit that button if you have it!

Is it the same if you add a gallon to the tank but then add the gallon to your fueling, then claiming you got a 600/700/800 mile tank?

 

That's precisely what I did with it, and planned to from the start. But I did check, the tank was spotless before I put it in.

I often use my truck for doubtful gas...it sucks so much fuel that when I blend old gas with new it's burned out in no time!

 

That's ok that the low fuel light is on, but I'm assuming the car will start with only one gallon added.

Please advise if that assumption is incorrect. Thanks.

 

Oh....that is very salient information - and completely contrary to any other car I've ever driven which start if there's any fuel spitting out of the injectors or carb.

Thank you for posting this. I will carry 2 gallons when I try this, I happen to have a 2.5 gal can.

 

Well, I would not classify facing death in the same category as potentially running out of gas...

but that said, yes, if I set a goal I do try to accomplish it!

 

Maybe so!

But if you like folks who are determined to achieve a goal, then yes, I'm your man.

 

Glad he posted that 2 gal minimum information, I'd have been REALLY mad had I put in a gallon and it didn't start! If I'm close on this tank I'll tote a couple of gallons, not just one.

That makes perfect sense on the rules. If you added any fuel there would be no way to get an accurate answer.

I'm betting better at this....with my weekend errands around town I actually increased my mpg to 62.2 on 230 miles by paying attention to lights and whether they are stale green or red & coasting appropriately.

But I was mad when I had to jockey the Prius in my driveway to get the Vette out and the engine started. Any way to keep the engine from starting when it's cold? I didn't try EV mode but something tells me that won't work anyway...

 

I'll try that. I think I tried to put in EV mode while I was already moving with the engine running and it said not available.

 

I realize I should search perhaps you'll humor me...what is S2 and S3?