nancy Elkins
7320 Clark Circle, Mechanicsville, VA
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Joined: 08/10/2012
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I have a 1990 Bounder, 454 Chevy Engine, 8 cyl. Towing Saturn stationwagon, 4 wheels down. Last trip in 90degree temps. Dash A/C used. Interstate driving. Mpg was 5.3. Would I get better mpg if I used the roof A/C instead of the dash?
Other suggestions?
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Oasisbob
Portland Oregon 97266
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Joined: 11/18/2001
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You would have to run the gas generator to make that happen so overall fuel consumption probley be worse. Bottom line is you own a gas hog. You could tweak a few things but not going to help much. Sorry.
Oasis Bob
Wonderful wife & 4 Really Fun kids
2008 KIA Sedona 3.8L 24 valve V-6
2001 Bantam Trail Lite B-19
HAPPY TRAILS
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enblethen
Moses Lake, WA
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Joined: 01/05/2005
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What was your speed? Slow down to around 55-60 will improve your mileage.
You may want to check your wweight. Rig may need to go on diet. If you haven't used something in the last couple of trips, you don't need it.
Bud
USAF Retired
Suzuki XL7 pushing Pace Arrow
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pulsar
Lewisville, NC
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Joined: 12/30/2001
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Moved from Forum Technical Support.
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kalynzoo
Los Angeles , California
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Joined: 12/30/2005
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My previous Holiday Rambler 454 at very best approached 8mpg. For sure 5.6mpg is on the low end but depending on your speed, the grade of the road, wind, tire pressure, and the quality of the gas, 5.6 might not be unreasonable.
When I used my Onan generator to run the twin roof AC units I burned about 1 gallon per hour. My current generator burns closer to 2 gallons per hour.
My friend had a Banks unit on their previous 454 Fleetwood. The said it improved their ability to pull an 8% grade, often encountered in California, but they did not really get better gas mileage....un scientific, gathered from the fact that we both stopped at the same fuel station together.
That leaves you with a few choices: Keep you speed at a "sweet spot", mine was 55 to 60mph. Check your tire pressure, tracking and balance. Avoid travel during heavy stop and go traffic. Gee....I sound like a DMV commercial...Sorry.
Anyway, Happy Trails.
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Weathertodd221
FL
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Joined: 12/03/2009
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Id start with a basic tune up (plugs, wires, air filter, ignition cap & rotor) then cold air intake and if you have the $$... headers/exhaust.
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Stim
NE Florida
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Joined: 05/23/2007
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Generator/AC will use less fuel. 4KW Onan is rated for 1/2 gal an hour.
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chuckftboy
North Florida
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don't feel bad, my V10 only gives me 6.5 at best. I get 7.5 mpg when using the house air and not the dash air at 67 mph its pretty much a wash for me but the dash air keeps us cooler
2009 Pace Arrow F53 Chassis 2006 TJ Towd
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dalmationlovers
Port Orchard, WA
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You are pretty much in the ballpark. I have an 87 Allegro and get 5.35 all the time. It's tuned perfectly and I don't drive fast. My mechanic said the only thing that might make it better is a new improved carb. I don't feel like spending hundreds of dollars to improve a couple of mpg. We travel less than 2k a year so the dollars don't add up.
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Gale Hawkins
Murray, KY
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Joined: 07/22/2007
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The two things that helped the most on our 1992 454 TBI as going to the smaller 225 70 19.5 tires and using 93 octane gas. Note we do not have a carb.
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