On 4 Jun 2006 05:18:49 -0700, "gilly"
wrote:

Can anyone give me an indication of fuel useage, i.e how many gallons
per hour cruising and flat out with either a 3 or 4.3 or 5ltr engine.
I've been told that a 5ltr would be heavy on fuel with the extra weight
and 2 cylinders,and a 4.3 could be almost as economical as a 3ltr,so
i'm wondering if the 4.3 would just be cruising at 35mph compared to a
3ltr working flat out and burning as much fuel.

You can get a fairly accurate estimate of cruising gph by taking the
rated horsepower and dividing by 20. For example, a 260 hp engine
will burn about 13 gph at cruising RPMs (normally about 70% of wide
open throttle RPMs).