Thread: Petrol VS diesel?

Originally Posted by Vern

You were quoting how great your fuel economy is, but that is at 20kmh below the speed limit, vehicle is barely working. Now this thread is about petrol v diesel, not towing vans at below average speed limits. So most are quoting l/100 at highway speeds, so IF you towed etc..at highway speeds (100kmh) I would be guessing you would be adding 5l/100 to those figures or thereabouts would it not???

I tow at 85/90kph most times and Yes I get good fuel economy.
Towing a large boat or van is similar to cruising on a Boat, at mid/upper mid range on the revs ( I get 18/20kts at 4000rpm) I get good range from my 120l tank, If I travel flat out at 5600rpm and about 30/32kts I more than double my fuel consumption and I am flogging the guts out of my motor and boat.
So for more than twice the fuel usage and abusing my boat/motor (and my back) I gain a miserly 10/12kts in speed which is bloody senseless, The Same applies to my 4WD when towing or just driving.
IF I need to be somewhere at a certain time I leave early so I Don't have to SPEED like the other lunatics I see towing vans and boats "Wobbling" all over the road because they "Think" that they "Have" to be doing the speed limit or faster.

The same doesn’t apply - there are no boats stuck behind your boat, restricted to where they can pass. Nor are they forced to slow down behind you.

Poor analogy.

Towing at the speed limit is hardly flogging a motor, same for an outboard - they’ll sing all day every day and you’ll throw the boat away before it wears them out.

I’ve always been a firm believer that “do what you want, as long as it doesn’t impact me”. Problem is all these behaviours DO impact me, my friends, my work colleagues and other road users trying to optimise their time for a multitude of reasons.

Half an hour spent waiting to pass a vehicle doing 80-85 adds significant time to many of my journeys. It equates to 20km lost for every 30 min delay.

Originally Posted by Tombie

.....

And yes Mr Trout - speed kills - no stationary object has every crashed into another stationary object. Congratulations you too have swallowed the Government scare campaign.

....

Originally Posted by Bigbjorn

So you have fallen for the big lie that justifies revenue cameras. Speeding, as in exceeding the arbitrary speed limit set by politicians, bureaucrats, and police without regard to the prevailing circumstances, is almost never the sole cause of a motor vehicle incident. Our speed limits have not been increased other than metrication and a few miles of highway, since 1960. There have been exponential improvements in vehicles and roads since then and most major highways could stand an increase from 100 to 140.

LOL! so physics has nothing to do with it, and both Isaac Newton and Einstein were wrong(about their respective theories of energy and it's conservation.
Good to know.
Maybe they're were part of the government conspiracy too.
All just a ruse to make governments all that money from speeding fines.
LOL! they must have paid off the national debt by now considering all the income those speeding fines must be bringing in.

Originally Posted by Vern

.... So most are quoting l/100 at highway speeds, so IF you towed etc..at highway speeds (100kmh) I would be guessing you would be adding 5l/100 to those figures or thereabouts would it not???

Sorry, but define 'highway speeds'.
Half the highways here in Vic have had their speeds reduced to the point that it's quicker to detour 30klms on a 30klm drive .. that is the 60klm drive is quicker than the 30klm route!
Your assumption is that highway speeds are 100km/h .. which is just wrong.
I dunno where Woolgoolga is, but it's obviously not anywhere near Warnambool-Port Fairy in Vic.
You try maintaining 100km/h in this highway!(without a heap of demerit points and loss of license that is).
And the reason this 30km stretch of highway has it's speed limit set to 80k/h for 99.9% of it's length is that too many numpties with no respect for others, SPEEDing along it causing fatalities to the point that the conspiratorial managers of the state have decreased its speeds to what the flow really is.


It's hysterical how one topic turns to something else completely and onto reading the noble prize winning comments about speed and it's dangers.

Originally Posted by Tombie

The same doesn’t apply - there are no boats stuck behind your boat, restricted to where they can pass. Nor are they forced to slow down behind you.

Poor analogy.

Towing at the speed limit is hardly flogging a motor, same for an outboard - they’ll sing all day every day and you’ll throw the boat away before it wears them out.

I’ve always been a firm believer that “do what you want, as long as it doesn’t impact me”. Problem is all these behaviours DO impact me, my friends, my work colleagues and other road users trying to optimise their time for a multitude of reasons.

Half an hour spent waiting to pass a vehicle doing 80-85 adds significant time to many of my journeys. It equates to 20km lost for every 30 min delay.

Oh Dear
ANY engine be it marine or car is NOT designed to be run flat chat all the time and IF you actually knew anything about boats you will know that the boat itself will always outlast its engine.
Like I have said before if you need to get somewhere at a certain time then leave earlier because believe it or not You do not own the road and other road users don't want/need to drive flat chat and you will simply just have to put up with it and allow a bit of extra time to get to your destination.

Originally Posted by trout1105

Speed KILLS, That is a Proven FACT So travelling a bit slower is NOT dangerous even though it May annoy you

bad driving kills. not speed.

if speeding was dangerous, why would we allow our police to do it?

Originally Posted by trout1105

Oh Dear
ANY engine be it marine or car is NOT designed to be run flat chat all the time

umm, the plane i fly, take off rpm and cruise rpm are the same. the engine is flat chat all the time.

Originally Posted by Eevo

umm, the plane i fly, take off rpm and cruise rpm are the same. the engine is flat chat all the time.

Yes But the "Pitch" differs which means that the engine isn't working as hard cruising as it is on take off

getting back to petrol for petrol vs diesel, imho it depends upon the application.


diesel as a sports car? no thanks.
petrol in a jet aircraft? no thanks