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Old 01-11-2018, 12:12 PM   #1
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Default How fast do you tow your boat on the interstate?

What size/weight boat?
What truck/engine?
Do you have a t top
When does the mileage fall off the cliff?
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Old 01-11-2018, 12:21 PM   #2
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I have a 25' Aluminum windshield boat with a semi rigid canvas top, quite different from what many of you have. I keep it at 65 just to be friendly to the canvas. Either way, the Duramax does not get better mileage as you increase your speed past 65, empty or towing.
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Old 01-11-2018, 12:41 PM   #3
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I keep it right at 55-60. It's a 4K lbs rig with brakes. Ridgeline with 3.5 V6. Gets 11-13 mpg depending on terrain. I don't drive faster so don't know where it falls off.

Many states have a 55 or 60 mph trailering speed limit.
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Old 01-11-2018, 12:41 PM   #4
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22 cc
1500 series with a 6.2L
Yes
As soon as I hook up the trailer
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Old 01-11-2018, 12:56 PM   #5
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75-78 mph most of the time.

2008 Ram 1500 5.7 Hemi

20’ dual console, no t-top, but does have a full windshield. Occasionally tow my brothers 20’ CC. Tows identically.

Mileage drops to 7-8.

Can get 10-11 on secondary roads running 60-65.
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Old 01-11-2018, 01:05 PM   #6
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And, for those of you that drive over 60, how many have a) read their sidewalls to know the max speed that their tires can handle and b) regularly inspect said tires for damage?
wezie and SouthpawHD like this.
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Old 01-11-2018, 01:06 PM   #7
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70 -72 mph on cruise.
T-Top radar, full wrap canvas enclosure, etc.
Right at 10k lbs with trailer
Antique duramax (2002)
I never tow it faster so no clue on MPG for that but I get right at 10 mpg going 70-72.
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Old 01-11-2018, 01:09 PM   #8
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I keep it between 60-65 mph.
2016 ram 2500
Hardtop
Averages 9.5-10 mph at best.
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Old 01-11-2018, 01:19 PM   #9
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Default 2000 f250 7.3

75-78...depending on what the radar detector is doing.....if you go any slower you are a danger to the usual fast flow of traffic. I have a triple axle trailer, truck/trailer/boat package weighs in depending on what I carry at about 14,500.

I make trips to they keys weekly...carry six trailer spares..extra hubs and brake hubs...generator, impact wrench....bearings...two 4000# jacks and all assorted tools needed... In almost 30 years of trips, have never had a truck flat or blow out..using Firestone AT's but have lost numerous hubs-trailer tires..multiples on some trips...summertime is the worst......Tampa I-75 to 29 to 41-krome-tavernier.
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Old 01-11-2018, 01:22 PM   #10
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Quote:
Originally Posted by rickboat View Post
And, for those of you that drive over 60, how many have a) read their sidewalls to know the max speed that their tires can handle and b) regularly inspect said tires for damage?
Absolutely. I'm not going down the road with junk tires on anything.

One thing that hasn't come up in this thread, as far as ease of towing goes, some trucks pull better slightly faster, or slightly slower, depending on the gearing. Mine does much less gear hunting between 75 - 80 than it does between 70 - 75.
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Old 01-11-2018, 01:22 PM   #11
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My Tundra will tow my 25 foot boat clocking in around 8K like a 2500 going light speed.
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Old 01-11-2018, 01:34 PM   #12
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Quote:
Originally Posted by autobaun70 View Post
Absolutely. I'm not going down the road with junk tires on anything.

One thing that hasn't come up in this thread, as far as ease of towing goes, some trucks pull better slightly faster, or slightly slower, depending on the gearing. Mine does much less gear hunting between 75 - 80 than it does between 70 - 75.
Are they trailer tires? If so, you just THINK they're good.
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Old 01-11-2018, 01:38 PM   #13
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Towed a 30 ft CC from Jersey to the Keys the day after Christmas

70-75 the whole way
Ram 2500 diesel
Averaged 11mpg

If you are gonna roll fast you need a real truck that can pull AND stop the load
Not some no frame unibody wannabe Jap truck
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Old 01-11-2018, 01:47 PM   #14
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55 in the slow lane
Cobia 237 6300 lbs
2013 Tahoe 4wd
8 to 10 mpg

Last edited by Offshoreaddicted; 01-12-2018 at 05:26 AM.
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Old 01-11-2018, 01:47 PM   #15
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Quote:
Originally Posted by Captainbadfinger View Post

If you are gonna roll fast you need a real truck that can pull AND stop the load
Not some no frame unibody wannabe Jap truck
If it's not body on frame construction it's not a truck. Rather a glorified grocery getter.
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Old 01-11-2018, 02:26 PM   #16
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2017 F250 diesel; boat on trailer is 11K; tractor(s) on trailer or in dump trailer is 10 to 15K depending on which one. Depending on conditions I will tow up to 85 MPH with no problems.
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Old 01-11-2018, 02:30 PM   #17
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I have a 2015 f150 with the 5.0.
I tow a 20' cc with at top. Trailer loaded with boat is a little under 5k. Have surge disc brakes on both axels and the truck can control the load and stop fine. Truck and trailer have e rated tires.

Only get 10 mpg at 70 in 5th gear and mileage falls like a rock over 70. If I go 60 to 65 I can get 12 mpg. I think it is the aerodynamics that are killing me.

The new diesel f250s sure are sexy but might require a bigger boat.
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Old 01-11-2018, 03:04 PM   #18
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2000 F250 7.3 auto - 3.73 gear - 23' Seacraft cc with T-top - tow 65 to 70 - trailer tires at max pressure (50 psi) - get 14 to 15 mpg. Falls off the cliff at 72 +. Weight around 5500 all in. Tow from Cape Cod to Marathon and back annually.
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Old 01-11-2018, 03:52 PM   #19
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23' CC with hard T top. 6k rolling.
Tundra 5.7L
72 with cruise set and trans in D4 or D5 depending on terrain
9mpg
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Old 01-11-2018, 04:54 PM   #20
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23' CC, 6600 pounds wet ready to rock
Hardtop
04 5.4 2v F250
Try to keep 70+ in the mountains to avoid gear hunting
As soon as I shift from "P"

Edit: 87mph tires, tandem axle disc brakes

Last edited by Stray Current; 01-12-2018 at 05:24 AM.
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