Originally Posted by jongies3
Until the mid 90's, dual tanks were the norm on pickup trucks. Not very unusual for RVs to have them also! Both guzzle gas so it makes sense to have one for backup.
My old first generation Bronco has them as well, it's nice since the fuel gauge doesn't work, when one runs out, just switch over and carry on! Handy as heck.
Dual fuel tanks were a stupid idea that unnecessarily over complicated a fuel system. I have them on my 1991 Ford F-150. They only hold around 16 to 18 gallons each. (The most I ever put in was 34-1/2 gallons with both tanks in the red). So you really don't get any more range than you do with one large tank. I think the Chevy Suburban's back then had one 36 gallon tank with the 454 models.
I've never had any trouble with mine, but I see zero advantage to it as far as any added range. I knew a guy who had one, and the solenoid switch went south, stranding him with a full tank. Ford finally got away from them in favor of one large tank. Also, with the improved fuel economy of the newer engines, there was an even lesser need for them.