[C38] Are diesel engines significantly more fuelefficientthan gas?

[tdtron at earthlink.net]

Diesel vs. Gasoline.  If anyone wants to be a truly nerdy geek about fuels, they can check out this link:

http://en.wikipedia.org/wiki/Fuel_efficiency

I think that link should make you eligible for some type of engineering degree in petrochemistry, engine design, or something.

The bottom line is, other than the safety factor of diesel, diesel packs more energy per volume of fuel.

Diesel has 137,700 BTU's vs. 125,000 BTU's per gal of gasoline (petrol).

"Diesel engines generally achieve greater fuel efficiency than petrol (gasoline) engines. Passenger car diesel engines have energy efficiency of up to 41% but more typically 30%, and petrol engines of up to 37.3%, but more typically 20%"

30% vs 20% in real world situations?  That's quite a lot.

Tom Troncalli
nerd wanabee


----- Original Message ----- 
From: Jeffry Matzdorff 
To: Catalina 38 Listserve
Sent: 6/9/2011 6:41:32 PM 
Subject: Re: [C38] Are diesel engines significantly more fuelefficientthan gas?


Hi Marci,

Good question actually but I would tend to think that diesel is more efficient.  
Also, a lot easier to get ahold of on small islands and then there is the passing ship or fishing boat which can usually spare a few gallons..
The biggest factor for me is diesel is far less combustible  ;^}

Cheers,

Captain Jeffry Matzdorff
323.855.0191
www.offshoredeliveryskipper.com
----- Original Message ----- 
From: Marci Brown 
To: 'Catalina 38 Listserve' 
Sent: Thursday, June 09, 2011 3:34 PM
Subject: Re: [C38] Are diesel engines significantly more fuel efficientthan gas?


I "changed the subject." I was simply curious about which type of engine is typically more fuel efficient: diesel vs. gasoline (which is why I changed the subject line to reflect it).
 
Marci J. Brown
PO Box 520549, Winthrop, MA 02152 USA
Ph: 757-502-7422 | Email: mb at seafor.us
 
From: Jeffry Matzdorff [mailto:earthakat at msn.com] 
Sent: Thursday, June 09, 2011 1:20 AM
To: Catalina 38 Listserve
Subject: Re: [C38] Are diesel engines significantly more fuel efficient than gas?
 
Thanks, David.  Agreed.  
However, I did not ask the question comparing the two fuel types.  
Not sure how that subject was changed..
 
Cheers,
 
Captain Jeffry Matzdorff
323.855.0191
www.offshoredeliveryskipper.com
----- Original Message ----- 
From: david at dlrfilms.com 
To: Catalina 38 Listserve 
Sent: Wednesday, June 08, 2011 6:29 PM
Subject: Re: [C38] Are diesel engines significantly more fuel efficient than gas?
 
Jeff,

It's a sailboat. If you're noticing the differnce between gasoline and
diesel, you're not doing it right!


> ----- Original Message -----
> From: Jeffry Matzdorff <mailto:earthakat at msn.com>
> To: Catalina 38 Listserve <mailto:listserve at catalina38.org>
> Sent: Wednesday, June 08, 2011 10:27 AM
> Subject: [C38] Catalina 38 Universal fuel Consumption
>
> Aloha,
>
> I was hoping someone could give me an idea of the fuel consumption at
> various RPMS for the Universal 24 hp engine.
>
> Also, associated speeds at the various RPMs in flat water.
>
> Cheers,
>
> Jeffry Matzdorff
>
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