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Old 20 September 2012, 04:53   #1
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Opti DFI Oil usage

Has anyone done any analysis of DFI usage against fuel.

What I mean is, does it average out at about 50:1, 100:1....a lot more/less?

Trying to work out a cost per litre of fuel for the stuff as the tank doesn't get refilled after every trip in our club.

I suspect it depends on the type of running but an average would be good to know....if it exists that is!
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Old 20 September 2012, 07:44   #2
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Mine works out at around 75:1
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Old 20 September 2012, 12:01   #3
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Mine use 35:1 at cruising speed (4000ish rpm) although when on the river up to Paris generally just under planing speed, this reduced dramatically.

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Old 20 September 2012, 12:07   #4
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Pretty sure mine came to about 80:1 with mixed use ( slow & fast - not much in bewteen) .

I recal being slightly surprised by Martinis use in the past
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Old 20 September 2012, 14:13   #5
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Quote:
Originally Posted by PeterM
Pretty sure mine came to about 80:1 with mixed use ( slow & fast - not much in bewteen) .

I recal being slightly surprised by Martinis use in the past
It's all about load I guess. At 2.5 tonnes dry weight, mine are working pretty hard
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Old 20 September 2012, 14:59   #6
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Quote:
Originally Posted by martini View Post
It's all about load I guess. At 2.5 tonnes dry weight, mine are working pretty hard
Sure is when you look at them running with the cds plugged in the load does make a difference to oil use.
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Old 20 September 2012, 16:22   #7
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Opti Oil

With the typical mix of med-heavily loaded rib with 4 fatboy divers on a 15-20 mile fast cruise, 90 min idle whilst trawling/diving and fast return I seem to average 50:1 over the year

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Old 20 September 2012, 18:05   #8
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Sounds like 50:1 is a good ballpark figure to work to then

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Old 22 September 2012, 03:42   #9
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Thanks All!
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