CLASS RACER FORUM - View Single Post

ss3011 · 12-28-2016, 02:28 PM

I have a 1996 , 27 foot Southwind Storm with a TBI 454 pulling a 24 foot Wells Fargo enclosed trailer . There are two things that makes big difference in my fuel economy , the speed I go , and whether I use the cruise control . Best mileage I ever got was 9 mpg , that was going about 55 mph and not on cruise . Normally on the highway I can get 7 mpg , but that is never going over 65 mph , and driving it off the cruise control , trying hard to stay in 4th gear . My motorhome will almost run non-stop in 3rd gear if I run the cruise . If I drive , I can run in 4th gear most of the time , only rarely going into 3rd gear on long grades . That makes a big difference , and just lets the engine loaf along at under 2500 rpm .

12-28-2016, 02:28 PM	#5
ss3011 Senior Member Join Date: Feb 2002 Location: Southeast Michigan Posts: 909 Likes: 70 Liked 239 Times in 114 Posts	Re: 454 TBI mpg I have a 1996 , 27 foot Southwind Storm with a TBI 454 pulling a 24 foot Wells Fargo enclosed trailer . There are two things that makes big difference in my fuel economy , the speed I go , and whether I use the cruise control . Best mileage I ever got was 9 mpg , that was going about 55 mph and not on cruise . Normally on the highway I can get 7 mpg , but that is never going over 65 mph , and driving it off the cruise control , trying hard to stay in 4th gear . My motorhome will almost run non-stop in 3rd gear if I run the cruise . If I drive , I can run in 4th gear most of the time , only rarely going into 3rd gear on long grades . That makes a big difference , and just lets the engine loaf along at under 2500 rpm .