- Thread starter
- #201
Took delivery and I'll be unpacking this tomorrow!
Big tank on the bottom.
Big tank on the bottom.
Auxiliary Fuel tank for the empty space under the LX600?
- Thread starter CyanideRide
- Start date
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- Thread starter
- #202
Looking forward to putting some KM's on this.
Evap system as tested and it was green.
Techs stated that they were very impressed with the fit, finish, and build quality of the kit.
Now I just need money for gas and a spot to store the factory fuel tank!
Evap system as tested and it was green.
Techs stated that they were very impressed with the fit, finish, and build quality of the kit.
Now I just need money for gas and a spot to store the factory fuel tank!
- Thread starter
- #203
Those of you who have already done this, when you are refueling, does the pump stop when one tank is full requiring you to start the pump again, or does it just keep going until both tanks are full?
EscapeWagon62
SILVER Star
Pumping is just like it was before you installed the tank., you will notice zero difference other than a 3 digit bill since you are putting in so many gallons.
I was fearful that I’d have to fill the aux, wait for it to drain over to main and then start pumping again. Happily that isn’t the case.
- Thread starter
- #205
Much appreciate the reply EscapeWagon62!
Any reason why you didnt go for the slightly larger fuel tank?
Balance, weight? or?
EscapeWagon62
SILVER Star
In my case it was for three reasons:
1. Range total between main and aux was just about what I was looking for
2. If I ever wanted to revert back to 100% OEM it would be relatively easy to do
3. Balance
In hindsight, the accuracy of the gas gauge would be better just using a larger main as it keeps the OEM fuel sender. The downside to that is a modification is needed on the fuel sender housing . My setup had no modifications to any OEM system and I kept all the swapped parts in sealed bags in my basement.
Hmm, doesn't the aux require modification to the filling system? Maybe I'm misinterpreting.
It's a bolt on replacement filler tube, so you don't modify the OEM one.
Yeah, on my Brown Davies 87l aux tank it stays full longer, but overall it´s still accurate -- just not as linear as a larger main tank.
wiseinvestor
GOLD Star
I was waiting for the Brown Davies tank to show up on this thread.
- Thread starter
- #212
I went with both.
I'll see if the extra weight affects mileage, but gas right now is so expensive, I didn't do a full fuel up yet. 100L is $128CAD ouch
167L (44 gallons) of diesel gives 1000 miles more or less of mixed drivingI was waiting for the Brown Davies tank to show up on this thread.
EscapeWagon62
SILVER Star
Correct
No modifications. Just kept the original fuel sender unit snd filler tubes in sealed bags just in case.
Thanks to all for the helpful info on this Aux tank situation. Just took delivery of 2026 lx600 and think I want this. Wondering if anyone has any recommends for a place in Austin to do the work?
Thanks!
David
EscapeWagon62
SILVER Star
Update on fuel gauge level, Distance to Empty:
(reminder, LX600 kept the OEM main tank and added the Aux tank)
Fuel gauge - in and about 280 miles driven (at roughly 17.2MPG) the fuel gauge will start to come down and will show just above 3/4. At or around 320 miles it will actually go up to just below full and then start coming down naturally. This is consistent across multiple fill ups. My assumption is at this point it is grabbing the last of the fuel out of the aux tank via syphon vs. fuel sender unit/pump.
Distance to empty - At fill up it will show somewhere beween 265-300 miles to empty depending on my recent driving habits. It will start dropping as it is registering me using full even though my tank gauge still shows full while pulling from AUX. It will drop down to about 175 miles to empty when I'm reading just north of 3/4 tank during the transition from Aux to main as noted in my Fuel Gauge comments (essentially showing significantly less available miles to empty than it should). When the gauge goes up around 320 miles, the Distance to Empty resets itself back to a total range that is more accurate (265-285 miles to empty).
I think I understand the gauge performance assuming that it does suck the final gas out of aux.
My Distance to Empty does seem to recalculate less often than when I first got the rig and less than when I initially installed the Aux tank. My belief is that the car learned not to throw a CEL at the transition from Aux to Main (which to date only happened once) and part of this learning was to reduce some calculation on Distance to Empty. It is also common for DTE to reset after fill-up when the gas gauge goes up so it resetting when it pulls the remainder of the Aux tank fuel makes sense.
Nothing noted above changes my position that installing an Aux tank is a fantastic modification. Just passing this on to any other semi-OCD owners who track such things.
(reminder, LX600 kept the OEM main tank and added the Aux tank)
Fuel gauge - in and about 280 miles driven (at roughly 17.2MPG) the fuel gauge will start to come down and will show just above 3/4. At or around 320 miles it will actually go up to just below full and then start coming down naturally. This is consistent across multiple fill ups. My assumption is at this point it is grabbing the last of the fuel out of the aux tank via syphon vs. fuel sender unit/pump.
Distance to empty - At fill up it will show somewhere beween 265-300 miles to empty depending on my recent driving habits. It will start dropping as it is registering me using full even though my tank gauge still shows full while pulling from AUX. It will drop down to about 175 miles to empty when I'm reading just north of 3/4 tank during the transition from Aux to main as noted in my Fuel Gauge comments (essentially showing significantly less available miles to empty than it should). When the gauge goes up around 320 miles, the Distance to Empty resets itself back to a total range that is more accurate (265-285 miles to empty).
I think I understand the gauge performance assuming that it does suck the final gas out of aux.
My Distance to Empty does seem to recalculate less often than when I first got the rig and less than when I initially installed the Aux tank. My belief is that the car learned not to throw a CEL at the transition from Aux to Main (which to date only happened once) and part of this learning was to reduce some calculation on Distance to Empty. It is also common for DTE to reset after fill-up when the gas gauge goes up so it resetting when it pulls the remainder of the Aux tank fuel makes sense.
Nothing noted above changes my position that installing an Aux tank is a fantastic modification. Just passing this on to any other semi-OCD owners who track such things.
Super helpful info thank you!
Just so I’m understanding you:
Fuel gauge behavior:
∙ Fills up, reads full. Stays there for ~280 miles (~17.2 MPG).
∙ Around 280 miles, gauge drops slightly — shows just above 3/4.
∙ Around 320 miles, gauge rises back up to just below full, then begins dropping normally.
EscapeWagon62
SILVER Star
That is correct sir
Thanks!