Frontrunner 70 liter fuel tank

[johanvb]

I recently had a Frontrunner fuel tank installed...above the spare wheel..

Question...when I refuel the vehicle...which tank fills up first? Main or auxiliary?

Thanks

[Kaaskrul]

Depends.

If they fill it up on fast setting, rear tank first.
If they put the pump on slow, standard tank first.

Its got a Y piece now in the filler pipe.

[Toppie4x4]

Agree and you auxiliary tank is a bit higher than your standard tank and connected via a small balancer unit. Your fuel gauge will stay on full for quite a while. The y piece (in my vehicle) is very close the tank filler hole and they both are connected to the breather pipe and fills quite quick. When I fill up at a new garage the tenant usually looks under the vehicle for any leaks as soon as he pass the normal 70 or 80 litre mark.