safe engine speed
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New User
Joined: Dec 2005
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safe engine speed
i am the new owner of my first diesel
the truck is a 2000 drw with a 7.3 and a 6 speed
what is a safe engine speed for long highway trips?
also, is there a difference between gas engine oil and diesel engine oil?
the truck is a 2000 drw with a 7.3 and a 6 speed
what is a safe engine speed for long highway trips?
also, is there a difference between gas engine oil and diesel engine oil?
FTE Leadership Emeritus
Joined: May 2001
Posts: 13,653
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From: Cabot, Arkansas
Welcome to Ford Truck Enthusiasts maxtruck.
You engine is goverened to 3400 RPM. You can pretty much run it anywhere you want to below that.
There is a difference between gas and diesel oil. Look for the diesel ratings on the bottle. You need a 15w-40 weight oil.
You engine is goverened to 3400 RPM. You can pretty much run it anywhere you want to below that.
There is a difference between gas and diesel oil. Look for the diesel ratings on the bottle. You need a 15w-40 weight oil.
Senior User
Joined: Jul 2004
Posts: 399
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From: Milwaukee
Try to stay below 65MPH or 2,000RPMon the highway (as hard as that sometimes is!) You'll see your best fuel economy at or under 2k, rather then 3,300 where you can see the fuel puff out behind you.
DC-9
DC-9
Hotshot
Joined: Jan 2002
Posts: 17,988
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From: La La Land
The truck CAN do it all day long, day in and day out. They are one mighty-fine "road car", and that's why there are so many of them out in West Texas.
It's just your fuel economy that's gonna' suck any time the RPM's get much above 2000. And it WILL.
Pop
It's just your fuel economy that's gonna' suck any time the RPM's get much above 2000. And it WILL.
Pop
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Fleet Owner
Joined: Jun 2004
Posts: 25,090
Likes: 1,111
From: Rio Rico, AZ.
Originally Posted by Black88GT
On my long trips, I run it say 2500 rpms for quite some time. (85 mph or so) Is this bad? I was told early on that it was not dangerous, and the truck could do it all day. Thanks.
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Senior User
Joined: Jan 2005
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From: Monterey Park, California
Mine can cruise at 90mph about 2700-2800 rpm with the cruise on. I'm just keeping up with the fast guys on the I-5 which is a very fast interstate. When the road starts to wind thru the rolling hills, the cruise will let off going down and floor it going up. All maintaining 90mph.
Also I've nearly redlined mine going up winding roads in 2nd and watching the tach. I was surprised how silky smooth the engine becomes after 3000 rpm. I knew right then this engine is very well balanced and not going to come apart. Was also on the 100hp Predator tune too.
Also I've nearly redlined mine going up winding roads in 2nd and watching the tach. I was surprised how silky smooth the engine becomes after 3000 rpm. I knew right then this engine is very well balanced and not going to come apart. Was also on the 100hp Predator tune too.
Last edited by Hello; Dec 26, 2005 at 01:44 PM.
Elder User
Joined: Jun 2003
Posts: 642
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From: Bay Area, CA
Whew, I got scared there for a minute 
Ive only had it up near the redline once, and that was when the OD was off and I was passing a Chevy :headbang: As far as the fuel cunsumption, What do you all get cruising 2500 or so rpms? Last trip to AZ I got aroung 11.6 
This year I will change the oil right before the trip to see how It goes.
Ive only had it up near the redline once, and that was when the OD was off and I was passing a Chevy :headbang: As far as the fuel cunsumption, What do you all get cruising 2500 or so rpms? Last trip to AZ I got aroung 11.6 This year I will change the oil right before the trip to see how It goes.
Posting Guru
Joined: Nov 2003
Posts: 1,949
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From: Near DC
If you remove the throttle from the back stop you can expect to see around 17 mpg empty.
Here are a few threads talking about economy, good reads.
https://www.ford-trucks.com/forums/s...earchid=252516
Also, the "kwik mod" or 6637 air filter mod may improve your economy and give ya a boost in the seat.
https://www.ford-trucks.com/forums/s...d.php?t=277571
Here are a few threads talking about economy, good reads.
https://www.ford-trucks.com/forums/s...earchid=252516
Also, the "kwik mod" or 6637 air filter mod may improve your economy and give ya a boost in the seat.
https://www.ford-trucks.com/forums/s...d.php?t=277571
Last edited by Steve_250; Dec 26, 2005 at 03:14 PM.
Fleet Owner
Joined: Jun 2004
Posts: 25,090
Likes: 1,111
From: Rio Rico, AZ.
Originally Posted by Black88GT
Whew, I got scared there for a minute Ive only had it up near the redline once, and that was when the OD was off and I was passing a Chevy :headbang: As far as the fuel cunsumption, What do you all get cruising 2500 or so rpms? Last trip to AZ I got aroung 11.6 This year I will change the oil right before the trip to see how It goes.
Ive only had it up near the redline once, and that was when the OD was off and I was passing a Chevy :headbang: As far as the fuel cunsumption, What do you all get cruising 2500 or so rpms? Last trip to AZ I got aroung 11.6 This year I will change the oil right before the trip to see how It goes.On my truck it's about 3200-3400 rpm, somewhere in that range. Lot's of people pass me as I limit my speeds to 70 at 2500 rpm when out on the interstate empty or pulling the trailer. I don't hog the left lane either like some people do.
I'll get 13 empty and 9 towing with a fresh oil change before I depart using Mobil 1 Delvac 5-40 and fresh filters all around.
Posting Guru
Joined: Sep 2005
Posts: 2,476
Likes: 2
From: Monroe Michigan
Originally Posted by Kwikkordead
.
I'll get 13 empty and 9 towing with a fresh oil change before I depart using Mobil 1 Delvac 5-40 and fresh filters all around.
I'll get 13 empty and 9 towing with a fresh oil change before I depart using Mobil 1 Delvac 5-40 and fresh filters all around.
My quess is over 10,000lbs