to diesel OR not to diesel? - Page 3

12-10-2007, 10:00 PM

#51

oilbelcher

Almost a Member!

Join Date: Feb 2006

Posts: 62

Likes: 0

Received 0 Likes on 0 Posts

2005 E500 AMG pkg

Quote:

Originally Posted by jbrockiii

I too am considering the ML320 CDI, actually think I'm pretty much sold on it. As soon as I sell my current SUV I'm getting one.

Question- is it true that diesels get BETTER gas mileage at HIGHER SPEED??

Also, if anyone knows, why do people leave their diesel engines running so much?? I've got a farmer friend who leaves his diesel running while he naps in the afternoons? Is it cheaper to just leave a diesel running?? Silly question, but curious.

my understanding is diesels are load sensitive and use very little fuel while idling or cruising downhill - relative to gas engine. frequent starts/stops, especially in bad weather, will cause excess wear. it can take a long time to warm up a large diesel truck engine in cold weather, and to prevent fuel from gelling up in cold - sometimes better to idle. if you are driving less than 5 miles between stops, and only run into a store for a couple minutes, just idle your diesel engine.

Reply Like