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Old 09-05-2016, 07:31 PM   #31
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Quote:
Originally Posted by mojoman View Post
You have to buy "racing oil" for off road use to get the higher levels of Zinc now days.
It has also come back in some other products, too. Small engine oil, high mileage oil in some cases, "break in oil", some high performance labelled oils, classic car oil. You have to be careful with some of the racing oils, as they really are racing oils and very low in detergent and other street needed additives.
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Old 09-07-2016, 03:53 PM   #32
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Mkguitar, brochure says Gcwr is 12500 and gvwr is 7700. But I understand I need to check my hitching setup and tires for their limitations too. With this much weight I might be tempted to try the synthetics. Curious to know what others get for mileage when towing.
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Old 09-17-2016, 03:53 PM   #33
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Labor Day as I suspected was a traffic mess but thankfully no accidents. From home to campground was only 60 miles with a climb of 2000 ft. Rig was empty w 3 people...a disappointing 11 mpg...a whopping 27% less . This time I also had the fridge on dc while driving but never ran the onan the whole weekend. I was trying out a 400w solar generator which was charging on the cigarette lighter during the drive.
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Old 02-20-2018, 04:43 AM   #34
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Default 20 MPG is possible in a RT 170P

When I first bought my 1997 RoadTrek 170P, I headed off from California to Colorado and made my way back, and got 16.4 MPG averaged over the whole trip. I thought this was pretty good, considering the Colorado Rockies I had to traverse, but for most of this trip I also had to keep my speed down to 50-55 MPH due to a steering wobble problem (which was later fixed).

Later, I got a ScanGauge II and found the transmission was spitting out a PO740 code, indicating the transmission torque converter was not locking up as it should in fourth gear, and this reduces the gas mileage. I had the tranny serviced, on a trip to Arizona (RTR 2017), the ScanGauge-II indicated I was getting 20 MPG (long-term average), and even 21 MPG (long-term average) at times. I kept my speed about 55 MPH for most of the trip.

Unfortunately, the PO740 code has returned, and consequently my gas mileage has dropped, so the problem with the lock-up torque converter is not fixed.

P0740 means that the Powertrain Computer or PCM is seeing greater than a 200 RPM difference between the rotational speed of the Torque Converter and the Transmission Input Shaft.

The transmission problem might be something simple or something expensive, and cracking open the transmission is a messy job, so I'll have a shop do the work.

I'm looking forward to 20 MPG again!
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