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Old 12-07-2012, 07:55 AM   #1
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Cat 400 HP

Could someone give me an idea of the fuel mileage on a 400 cat driven at 65mph. I am thinking of going to a 2007 Beaver which has this engine. I am now driving a 360hp. Cummins. Thanks,
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Old 12-07-2012, 08:07 AM   #2
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Mine is 8 MPG with toad on a 40 ft coach that weighs about 45,000 lbs. depends on many variables.
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Old 12-07-2012, 09:29 AM   #3
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I get an overall average of 7 on mine. That includes flat land and mountain travel with a toad.
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Old 12-12-2012, 10:03 PM   #4
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On a 4,400 mile run, I got 7.5mpg pulling a Jeep Wrangler toad. I also had a lot of trouble with overheating.
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Old 12-12-2012, 10:30 PM   #5
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Quote:
Originally Posted by bgc44a View Post
On a 4,400 mile run, I got 7.5mpg pulling a Jeep Wrangler toad. I also had a lot of trouble with overheating.

I think the prevailing thought on this website concerning the overheating issue is probably due to a rear radiator that needs to be cleaned. The engine blow-by gets on the radiator finns and then dirt/dust collects on it. There are several threads that address the cleaning process. Hope this will help your situation.
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Old 12-13-2012, 05:20 PM   #6
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If you want to improve that MPG, slow from 65 to 60.
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Old 12-13-2012, 05:27 PM   #7
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My 32,000 lb coach with a C-12 Cat pulling a 3,500 lb toad got 8.1 mpg on its first 71,000 miles according to the SilverLeaf computer. I typically drive 63 mph on level roads.
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Old 12-13-2012, 06:18 PM   #8
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6-6.5 pulling 7,000 lbs going 65-70 with zero trouble with side radiator.
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Old 12-14-2012, 01:50 PM   #9
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Not exactly an answer to the question, but this link is very good:
http://http://www.catrvclub.org/PDF_...nding_Perf.pdf

My C13 gets about 7.3 mpg in mountain driving pulling a Suburban. CGVW is about 48,000 pounds. Flat ground without the toad I saw 7.8 mpg.
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