Originally Posted by camp4life
We average 14 MPGs without trailer and 8.55 MPGs with trailer. Yikes! Any suggestions on improving MPG's.
You are pretty much normal at 8.55.
If you think that's bad, try towing with an underpowered V6 1/2 ton. Our last trailer was 20' & 5K lbs and we were under the max. tow capacity but we were frequently getting in the 5-6 range because the little engine was always running at higher rpms and at or near max. output. Would get down to around 35 mph flat out on steeper hills.
Towing our current 29' 6600 lb TT (also a KZ) with a V10 3/4 ton varies between in the 8 range to over 10 mpg depending on the driving conditions. If we're on twisty and hilly roads, the mpg drops significantly and there's not much you can do.
The biggest factor in towing any trailer is the speed and wind resistance. Trailer weight and length is not much of a factor compared to speed, it's the frontal area of the trailer. Wind resistance varies with the square of the distance so slowing down another 5 mph or even 10 mph can make a huge difference. MPG of a fifth wheel or toyhauler will be less because of the additional height.
There's no need to tow at 65 mph or higher. 60 is a decent speed and you can set your cruise control at 60 and relax. Going 65 and higher is not relaxing and can be a lot more of a handful to drive. At slower speeds you can catch a bit more scenery along the way too.
If you were to calculate the extra time it would take over a 400 mile drive to drop from 65 to 60 mph or even 55, you are talking about minutes longer for the trip. There's just no need to push it and you're not a truck driver on a clock...
I think you may find it is more tiring to drive with cruise control off especially on longer trips. If you are driving on relatively flat freeways/highways, it's the way to go. If it's hilly and twisty and/or gusty, you'll find it's better to turn it off.
There are some other tactics:
Avoid the temptation to pass other vehicles in front of you. If you are driving at say 60 on a 2 lane (or more road) don't let vehicles behind you intimidate you into speeding up. (Besides, it doesn't matter what speed you're at, many drivers think RVs are waay to slow no matter what your speed.)
Try to avoid slowing down and speeding up and keep as steady a speed and rpms as you can. Accelerate slowly when you need to gain speed. When approaching a stoplight or stop sign, slow down gradually and try not to come to a complete stop.
Avoid the urges to see how much power your engine has.
Turn your cruise control off when approaching a hill, coast up the hill and slow down a bit. Then resume speed after you've crested the hill.
Avoid using A/C in your TV if possible unless it's unbearably hot.
Try and learn to drive by maintaining a steady rpm and not by speed on hills or in windy situations.
Shut off engine when stopped for a minute or longer.
Use overdrive to reduce rpms when you can.
An enclosed underbelly will reduce drag. If you don't have it, consider installing something.
Use sway control. If you don't have it, your TV has to work harder to maintain a straight course.
Make sure your TV is in top shape. Replace filters and make sure oxygen sensor is good. Do oil changes in engine and transmission. Replace shocks if tired. Replace spark plugs if getting old.
Yes, make sure tire pressure is where it should be. Should be done anyway for handling, safety and tire life reasons. Higher tire pressure will reduce rolling resistance.
You could consider a wind deflector like the Aeroshield one. Have not seen figures claimed for mileage improvements. http://http://www.icondirect.com/cat...rs/AeroShield/
I suppose there's always engine mods, but you could end up spending a LOT of money for little improvement compared to simply slowing down.
Another idea is to try and ensure you have stocked up on all the groceries and suppies you need before you get to a campground. If you have to run around finding stuff, it can really eat up gas, esp. if it's some place you are unfamiliar with