Even that equates to about 35 mph. Must so a lot of sitting or idling to be that low?

 

Not really, I warm it up for 5-10 minutes before driving it. I won't move it unless it's at least 100°. That, combined with any town driving keeps the average down. We get plenty of long trips, just not normally on the freeway.

 

35 mph average speed is just about as "normal" as one can expect.

I just went and checked my '07;
209,044 mi.
4,109 hrs.
which equates to 50.86 mph

I do mostly highway driving which is why my average is so high compared to others.

I change oil at 7,500 mi. intervals and every time I am within +/- 2 of 150 hrs., it's because of this I have always thought I could stretch my OC's out to 10,000 mi., but I never have. Staying within owners manual specs are good enough for me.

 

75,100 Miles
2,908.4 Hours

 

222000 miles and 4650 hours, just purchased this truck.

 

303,331 miles & 6031 hours (50.29 mph)

2006 F-350 Lariat Superduty LWB SRW
White over Arizona Tan*Line-X Bedliner*4" MBRP Turbo Back*Blue Spring*SGII *XDP Coolant Filter*FICMRepair.com w/Eco Tune* Edelbrock Shock Absorbers*Archoil*Rotella T5 10W-30*Elite Diesel Torque Tow 155cc Injectors

 

Last summer I put on 6,000 miles in 60 days. Sent my oil sample off to the lab. The comments came back stellar and recommending to try changing the oil now at 10k.

I normally don't drive that much and my truck avgs 45mph since new with freeway miles.

With my 6.0, I just don't have the nerve, yet, to run it up to 10k on one oil change.

 

Well,
Just finished a 6,500 mile trip and just turned 100k. With almost 2200 hrs, that keeps my avg at 45.46 mph. Amazing how it's stayed virtually the same, whenever I've checked it.

 

my truck has 207k miles and 7081.9hrs. What are your thoughts on this?

 

That's a good bit of idle time.

 

That gives your truck a lifetime average of 29 m.p.h. Many will show 35 while highway queens may show 50+ but isn't that common. Idle time is what kills it. Ideally if it's running it should be turning a tire.

 

So the slower your average speed is, the more wear and tear it is thought to have on the motor vs higher the speed? ie....29 mph vs 55?


What is an average mpg for a truck with over 200k miles?

 

I'm not sure one is better then the other. Piston time is still piston time and wear is wear. As long as you are operating with spec with temps, coolant, oil, tranny, etc, I'm not sure you're engine knows the difference.
If maintanence is good, wear should be static.
The are other ramifications tho, turbo sticking, injector issues, etc that can be affected by idle time.
Those Cats up in Alaska run 24/7 unless being maintenances. Sure, built for different needs but those pistons are still Pistons moving up and down.

 

Not sure if you saw this post in this thread or not.

That truck hit 10,000 hours @ 400k, and was at double that when the post was made so you can reasonably figure 20,000 hours on a well maintained vehicle.

I wouldn't worry about yours @ 7k. Naturally you're not on track to hit 800k miles when you hit 20k hours, but if you maintained the same 29 mph average you're on track to hit 584,580.

So, if 20,000 hours is somewhere around the ceiling you've still got plenty of life left if you also maintain it well.

 

A high hour/ low mile passenger vehicle engine indicates extensive idle time. Idle time is a cold engine bringing on wet stacking and oil dilution with fuel. Diluted oil gives you increased wear. It's said one hour of idle is equalivent to 25 miles of wear.
Ford recognized this and put out an announcement. See first bullet. There was another announcement about extensive idling but I'll have to search for it.