They are simply built much tougher. Diesel engine have a compression ratio that is much higher than any petrol engine. As such the internal parts must be built stronger to handle the higher compression. Also the diesel fuel itself provides some lubrication. These factors provide for a much longer life.
Mobile One Synthetic for High Milage engines
20 50 heavy oil is good for height milage engines
Most vehicle engines in the US are made of cast aluminum. Previously, they were made of steel, but in the gas milage race, cast aluminum won because it is lighter.
5w30 is preferred especially in colder climates. 10w30 can also be used. For older engines the new high milage oils are helpful.
The highway gas milage for a Dodge Dakota varies by vehicle. Average milage is around 16 mpg.
Napthalene has been used to effect octane & improve milage but is not a practical rplpacement even though highly combustible. It is highly toxic with carcinogenic properties.
The gas milage of a sedan is 40 and the gas milage of a normal one is 25
WHAT IS THE MILAGE
EGR (exhaust gas recirculation) is usually located on the intake manifold. They must be taken off and the port cleaned underneath it. May have to replace the valve as this carbon (usually high milage engines) is very difficult to get out.
Milage... The counter tracts milage ...about 8,000 kms from 100 % to 0 %
Slow down
404 miles