[C320-list] Road Diesel vs Marine Diesel

[Robert Seastream]

I have two engine rpms I run between; 2400 and 3000.  2400 garners me  
similar results to yours, with the best fuel efficiency.  Regarding  
going with the tide, we've reached 10-12 knots SOG (per GPS) while  
running at 3000 rpm.  GPS is the best indicator of true SOG.  Any  
knotmeter employing a 'paddle wheel' sensor (even a clean one spinning  
freely) to me is bogus as it's indicating speed through the water  
rather than true SOG.  Against the tide will show a higher than true  
SOG.  With the tide will show a lower than true SOG.  Not worth  
cleaning the paddle wheel sensor.

Bob

On Aug 4, 2011, at 5:00 PM, Jack McDonough wrote:

> Bob:
>
> I know whereof you speak, having sat on a restaurant deck in  
> Portsmouth and watched boats fighting that current. Yikes.
>
> But, on the subject of speed, what RPMs do you run to get to 7.2  
> knots? Cruising at 2600, we get in the range of 5.5 to 6 knots.
>
> Jack
> #947
>
>
>
> ----- Original Message ----- From: "Robert Seastream" <robert.seastream at comcast.net 
> >
> To: <C320-List at Catalina320.com>
> Sent: Thursday, August 04, 2011 4:30 PM
> Subject: Re: [C320-list] Road Diesel vs Marine Diesel
>
>
>> Quarter tank.  We're six miles up the Piscataqua river from  
>> Portsmouth Harbor and open ocean.  We're sometimes fighting a foul  
>> tide of 6  knots. With a max boat speed of 7.2 knots I presume you  
>> can do the  math.
>>
>>
>> On Aug 4, 2011, at 8:57 AM, allan.field at verizon.net wrote:
>>
>>> Quarter tank or quarter gallon per weekend?! If tank, do you ever   
>>> sail?!
>>>
>>> Allan S Field
>>> Sent via DROID X on Verizon Wireless
>>>
>>> -----Original message-----
>>> From: Robert Seastream <robert.seastream at comcast.net>
>>> To: C320-List at Catalina320.com
>>> Sent: Thu, Aug 4, 2011 11:53:19 GMT+00:00
>>> Subject: Re: [C320-list] Road Diesel vs Marine Diesel
>>>
>>> I just buy it from marinas.  Our 320 has a 19 gallon tank and we  
>>> use about a quarter tank or less per weekend so I don't see any  
>>> savings  in price chasing.
>>> How much is your time worth?
>>>
>>> Bob Seastream
>>> Intuition # 906
>>>
>>> On Aug 3, 2011, at 2:47 PM, Jason Alexander wrote:
>>>
>>>> This article suggests that all marine diesel has moved to 500 ppm  
>>>> and
>>>> will be ULSD by 2012.
>>>> http://en.wikipedia.org/wiki/Ultra-low-sulfur_diesel
>>>>
>>>> It also suggests that ULSD will run in any diesel engine.   I guess
>>>> the question is, is that safe for our engines.   I tried to find
>>>> something from Yanmar but my google is weak today.
>>>>
>>>> Jason
>>>>
>>>> On Wed, Aug 3, 2011 at 2:23 PM, Donald Lawson <dnclaws at aol.com>   
>>>> wrote:
>>>>> All
>>>>> "untaxed" diesel  is available  for use primarily in  
>>>>> agricultural >>
>>> applications, such as fuel for tractors and recreational and >>   
>>> utility vehicles, such as boats,  that do not use public roads.  
>>> >>  This fuel may have higher sulphur levels.
>>>>> "untaxed" diesel is usually dyed red for identification.  I am not
>>>>> >>
>>> sure if your area is any different but our marina diesel is red and
>>> >> expensive and  I suspect CA requires ULSD already in both types.
>>> I >> always use an additive anyway these days as ULSD has less  
>>> lubricity.
>>>>> Don Lawson
>>>>> Ventura, CA
>>>>>
>>>>> On Aug 3, 2011, at 10:29 AM, Jason Alexander wrote:
>>>>>
>>>>>> Hello all,
>>>>>>
>>>>>> I think I know the answer to this but wanted to get people's >>>
>>> opinion.
>>>>>> Is there really any difference between road diesel and marine >>>
>>> diesel.
>>>>>> I suspect the only difference is in the additives.   According to
>>>>>> Wikiapedia all diesel will be required to be ULSD by 2012 so  
>>>>>> in  that
>>>>>> respect it should be the same.   I often can get road diesel   
>>>>>> cheaper
>>>>>> than I can get it at a fuel dock at one of the marines  
>>>>>> locally.    My
>>>>>> marina doesn't have fuel.  So either way I have to bring it in
>>>>>> >>> with
>>> me
>>>>>> or take the boat somewhere.
>>>>>> Either way I always put in a shot of bio-cide and stabil to  
>>>>>> keep  the
>>>>>> fuel as fresh as I can.
>>>>>>
>>>>>> Thanks,
>>>>>> Jason
>>>>>
>>>>>
>>>
>