Community Forums

Dave72 · 01-03-2013, 02:55 PM

I have 21' fleetwood w/ford 460. I haven't had it long enough to figure our mpg. What is a rough est?

Brockx · 01-03-2013, 03:05 PM

Quote:

Originally Posted by Dave72

I have 21' fleetwood w/ford 460. I haven't had it long enough to figure our mpg. What is a rough est?

7 to 8 tops
http://www.irv2.com/forums/f23/ford-...rs-133224.html

OOps I see now it's a C, probably do a little better

Quaddinmad40 · 01-03-2013, 03:11 PM

Congratulations on your new rig! I am guessing around 7 mpg maybe 8

Dave72 · 01-03-2013, 03:33 PM

Thx! Only ran local a few times last summer when we got it. Thinking maybe trip to Orlando from NE PA in late spring. $$$$ I guess.

CampDaven · 01-03-2013, 04:53 PM

Had an 84 Jamboree with Chev 350. 23 foot. 12,300 GVW. Did not tow. Kept it at about 62mph (peak of torque). Got overall about 9 mpg.

Just a book mark for ya. May mean nothing.
Happy trails!

ga traveler · 01-03-2013, 04:55 PM

It has a lot to do with your right foot.

trampsrv · 01-03-2013, 05:06 PM

i get 18 miles to the gallon on my 1997 windsport 460 ford.thats 10 on the highway and 8 in town LOL

drakethib · 01-03-2013, 05:50 PM

Maybe a dumb question but has anyone seen a increase in MPG by using Premium Unleaded?

CampDaven · 01-03-2013, 05:52 PM

Quote:

Originally Posted by trampsrv

i get 18 miles to the gallon on my 1997 windsport 460 ford.thats 10 on the highway and 8 in town LOL

Dang!
I love the new math.
So, if I get 11 on my rig and toad together, 2 vehicles means I get 22.
And if I just drive the rig and get 12.5 and the wife gets 20.5 with the toad, that's 23!
I am right, aye, trampsrv?

CampDaven · 01-03-2013, 05:54 PM

Quote:

Originally Posted by drakethib

Maybe a dumb question but has anyone seen a increase in MPG by using Premium Unleaded?

There have been studies on that and the very small gain gets tromped by the extra cost.

drakethib · 01-03-2013, 06:13 PM

Quote:

Originally Posted by CampDaven

There have been studies on that and the very small gain gets tromped by the extra cost.

Thanks always wondered if I should use a little Super Unleaded when pulling my TT.

Pulls great but extra kick never hurts

Brockx · 01-04-2013, 05:26 AM

Quote:

Originally Posted by drakethib

Maybe a dumb question but has anyone seen a increase in MPG by using Premium Unleaded?

Premium can actually give you less MPG when used in a lower compression ratio engine designed for 87 octane fuel.

Koop · 01-04-2013, 05:53 AM

There are a lot of misconceptions when it comes to gasoline octane and performance. The energy density is so similar that I doubt if a measureable difference could be detected in fuel mileage.

Higher octane fuel has greater stability and can withstand higher pressures (such as those in high compression or forced induction engines) before detonation occurs. If you don't have high compression or forced induction (supercharger or turbocharger) you won't see any benefit from high octane fuel.

On the other hand, if you do have high compression or forced induction, lower octane fuel will definitely decrease performance and may result in engine damage due to detonation. If you hear severe "pinging" or "spark knock" as it's sometimes referred to, you should run higher octane.

Brockx · 01-04-2013, 09:59 AM

Quote:

Originally Posted by Koop

There are a lot of misconceptions when it comes to gasoline octane and performance. The energy density is so similar that I doubt if a measureable difference could be detected in fuel mileage.

Higher octane fuel has greater stability and can withstand higher pressures (such as those in high compression or forced induction engines) before detonation occurs. If you don't have high compression or forced induction (supercharger or turbocharger) you won't see any benefit from high octane fuel.

On the other hand, if you do have high compression or forced induction, lower octane fuel will definitely decrease performance and may result in engine damage due to detonation. If you hear severe "pinging" or "spark knock" as it's sometimes referred to, you should run higher octane.

To add further to the above, most newer engines have anti-knock technology that retards the ignition timing to avoid the damage of pre-detonation. The spark retarding of course causes reduced performance / economy.