I would be there for the next test if it was not a 1,500 mile drive one way.

 

There is one 5.4 that has close to 1,300,000 on it now.

 

I want to see it. It's either a grandpa truck that had every recommended service done and meticulously maintained beyond belief or its so thrashed that it burns more oil than you can replace. But damn a 5.4, I know gearing has alot to do with it but I can't see an engine smaller than my 5.7 hemi in a truck that weighs 50% more than my quad cab 1500.

 

The most efficient land engine wishes it could be anywhere near 50% efficient. Most diesels are between 35-40% efficient, more automotive engines are probably around 35, which the biggest stationary diesels are around 40%. Most modern gassers are 25-30%.

The most efficient engine in the world is a gigantic ship engine, also the biggest engine in the world. Over 100,000HP. It uses compression ignition, but does not burn diesel. It burns bunker fuel (No. 6 fuel oil). It is basically one step up from road tar, and requires massive pre-heating before it is even remotely burnable in an ICE.

 

Home

Not as high as I thought. Just 1,200,000.

 

The one with the highest reciprocating weight, versus bearing size/rod size/wrist-pin size/etc/etc, would blow up first.

 

AKA V10 haha. All the components on diesel engines are beefed up as well so the one with the higher RPM will, i'm sure.

 

If a modern gasoline engine doesn't last at least 200,000 miles its a junk engine and not worth the metal it was cast with. Most modern gas engines will easily go 300,000 - 400,000 miles if not more. That 5.4 is a prime example of one too. The guy even went as high as 55,000 miles before an oil change!


Also, you have to keep a diesel well taken care of if you want it to last a long time as well. With their very tight ring/piston/cylinder clearances even the smallest amount of dirt that makes it past the air filter due to a leak (Some PSDs were famous for this) will quickly destroy the turbo and eat the cylinders. Same with oil, Diesels also need quite clean oil to stay happy (especially Power Strokes with their HEUI injection)

Do you even know what reciprocating means? Its back and forth motion. What goes back and fourth in an engine? The piston and rods. What engines usually have significantly heavier pistons and rods? Diesels. Heavier components feel the effects of high RPM much more then lighter components.

Lets take two engines, A 220HP stock 460, and the new 400HP 5.0 Mustang DOHC engine. The new Mustang engine has light weight components, yet can take 400HP and spin upto 7000 RPM. The 460 on the other hand has very heavy components, but realistically would not handle much more then 400-500HP on stock internals. Even if you kept that 460 at stock HP, trying to make it turn 7000 RPM on the stock internals would be disastrous. Their massive weight would rip themselves apart as they change direction going down the cylinders.

You riding a KX450F should know that, your bike like my CRF450 have very high revving engine (around 10,000 RPM redline), put out 50HP+ but still have very light weight internal components to handle those massive RPM

 

one grain of sand will blow up a gasser just as fast

 

I hadn't thought about this before, but the whole time I was saying the problem with the 7.3 was that it was in 3rd gear at 1,500/1,600 rpms and wouldn't downshift to 2nd. Maybe the tranny was shifting fine, but the gear spacing was such that it didn't downshift because it was going too fast to be in the next lower gear......

 

Call me a crazy, but I don't believe that guy. I know what he claims but I'm skeptical. I think there'd be many more like him if it were anywhere near true.

 

Ford even confirmed it was real, and had him tour the factory where his engine was made...

 

One thing people seem to be forgetting in all of these high mileage debates is the length of time the engine is running and how many times it is shut off(cools off then has to heat back up). Then they always quote semi's with a million miles on them(like that has anything to do with our psd). Chances are that semi drove over 800 miles per day, on the interstate, never stopped, etc. Anything will run a million miles under those conditions. It's like a guy that drives 500 miles a day on the interstate comparing clutch wear with someone that is using theirs as a farm truck that pulls out and stops every 10 feet.

 

That's great....still don't believe him. Correct me if I'm wrong but he is a courier, not an over the road guy.

 

Like phillips91 said above, highway miles are very easy on engines. That guy with the million mile van is an expediter. Basically stuff that needs to get somewhere quick, even if it is a thousand miles away. Check out the company the guy works for: http://www.bolt-express.com/expedite/#gpm1_4

There is even a Volvo with 2.6 million miles on it. The guy drives about 80,000 miles a year in it. Mostly all pleasure driving on the highway.