tyler k - 8/11/2015 3:12 PM

With a 18' aluminum boat you should be way under 5700lbs tow rating. Comfortably, that's a slightly different issue. Some manufacturers list package weight--I know Lund does. Then figure gas, gear, etc. For example, they list a Pro-V 1875 at 2848 or 2948 depending on model, so figure extras and you're probably around 4000.

2015 Ford Explorers and Toyota Highlanders have a 5000lbs tow rating (with tow package). I have a 2007 Rav4 V6, which despite being basically the same 3.5L motor they put in the current Highlander only has a 3500lbs rating. I pull a 16.5' aluminum tiller great with it, still get 17-18mpg while towing. But I know I'm limited in how much bigger of a boat I can get without upgrading the vehicle.