Originally Posted by
newhue
I think PD it depends a bit on your plans for the vehicle. Mid or long term keeper. Regular expedition or not so. And there is a convenience factor in there as well.
I have two sill tanks and though they cost a bomb, I feel they are better value then a rear replacement tank. Both are around the same compactly but I get to keep the original tank as well thus adding to the total. The sill tanks only scrape in the more serious off road, but they keep the weight low and even.
The scenario of a rupture and massive loss I don't feel is a reality with well made tanks, and they have taps to close of a tank if that ever happens.
If you plan to long haul regularly or for the next 30 years, then sill tanks put a smile on your dial every time you drive past $3pl, then $2.50pl, then $2.00pl and finally stop and fill at $1.50pl. Even in the city only going to the servo every 4 to 5 weeks can have benefits.