Gallons per hour

HOGAN

HOGAN

Moderator
Member
Joined
Mar 18, 2001
RO Number
3813
Messages
9,936
Over the course of the season, so far I have put 35 hours on the engines and used 750 gallons of fuel. That works out to 21 GPH, which seems incredible, but I'll take it.

Just filled up at Shupps Landing in Atlantic Highlands, NJ and paid $3.41/gallon for diesel.
 
What I find incredible is that you only put 35hrs on in a season. I did about 120 last year and I'm a little over 100 so far this year. I don't want to think about how many gallons or dollars that equates to.

Will definitely be topping off in NJ when I get to liberty landing on Sunday.
 
Mike I'm right there with you my last trip calculations were 24 hours 490 miles and 503 gals which equates to 20.9 gals per hour and .97 miles per gallon. I'm very good with these numbers! This was the first long trip MPG calculation I have done but the gallons per hour have been consistent as long as I have owned the boat. If I add a bunch of slow speed trips to the mix it drops down to between 12-17 gph and I get a big surprise when filling the tank because I'm not expecting it to stop so soon and it over flows.
 
Not counting the 2000-mile round-trip via trailer from MD to FL and back each year (which is hard on the truck, but easy on the boat):

Last year w/ new engines - 105 hours (we made it to Key West from Fort Pierce).
This year - 55 hours so far (more boating to do over next 3 months).

We've been all over the Chesapeake Bay as usual, but we saved a ton of hours in Florida. It was blowing 20-25 most of May and we only got as far as Ft. Lauderdale. There was no way we could cross to the Abacos and my liver couldn't take another visit to Key West :-)

Average fuel burn via running the numbers ranges between 5-7gph depending on speed and conditions. Real-time info shows 8gph at cruise. Gotta love a catamaran for economy :-)

Screenshot_2014-08-29-12-39-44%5B1%5D.jpg>


Screenshot_2014-08-29-12-43-19%5B1%5D.jpg
 
About 300 hours so far this year and... ZERO GPH!

:)
 
"Mike I'm right there with you my last trip calculations were 24 hours 490 miles and 503 gals which equates to 20.9 gals per hour and .97 miles per gallon."

Wow Dave - great numbers for sure.
0.97 mpg with a boat that weighs at least 32,000 loaded (likely more) ends up yielding 31 mpg per 1,000#'s and that is better than most any boats that cruise around with us.
Can get that pretty easy at hull speeds but most of your time is one plane - really good numbers.

Great stuff and a good season I hope
 
Smitty I having been tracking my numbers as long as I have owned the boat and it has been very consistent. 21 is the most I have ever logged and I was pushing at the time. Got to love diesels!
 
My mileage is actually a bit better, I added in 90 gallons of fuel that I shouldn't have
 
4950 RPMS on an outboard....Isnt that pretty dang close to wide open throttle?
 
Wow. Then I'm mighty happy with 5.5 gph with two DD 6v53s at hull speed.

By the way, does anyone get better diesel economy with Valvtect fuel? I could swear my "mileage" went from 1.3 to 1.6mpg when I switched.

Just wondering. Thanks.

V/R
 
Can't see how Valvtech made a difference in consumption, the additives are for keeping the fuel and injectors clean.
 
Dave / Hogan - just really good numbers that you want to be happy about. Way above the average for boats this sized.
Hull speeds are a whole different anima; but if you need to move above 7 knots for some real miles these are good combinations to have.

Have a great season
 
quote:
Originally posted by BoatCrazy

4950 RPMS on an outboard....Isnt that pretty dang close to wide open throttle?

Click to expand...


Not on these. Honda 60s red-line at 6,000. 60hp is achieved at 5,500rpm. We push 19 knots at that rpm so I back them down to 5,000 for cruise to save a couple gallons per hour and baby them a bit. My dealer thinks I am too soft on them :-)
 
I get 1.1-1.3 mpg as well cruising at 2250-2300 rpm. Don't feel to bad about the hours. 35 was my total last year and I only have 18 so far this year. But I did not get started until mid July. And only one more weekend (next weekend) before I haul out for the year.
 
John I maybe real close to your numbers as well I'm counting my generator burn into my mpg and I had a weekend on the hook in this calculation so it definitely is a factor I could probably remove 20 to 30 gallons for that but I like to work with actual numbers that I can recreate at anytime.
These are large boats for these kind of numbers I'm not in a rush to move up I know the difference in fuel burn will be huge!
 
According to my EVC (Electronic Vessel Control), at about 2700 rpm I average about 20 gph at about 26 knots. I don't really keep track of fuel and maintenance costs anymore because the last time I really tracked my boat costs (about 10 years ago), I got so depressed, I sold the boat, lol. I still try to save money whenever I can, of course, but sitting down and computing the cost of operation (per hour, for example) would probably depress me beyond my wildest expectation. Nope, I just won't do it!
 
That does make a pretty big difference. We are marina hoppers and I rarely use the generator. I just put the refer on 12v.
 
LOL I made the mistake of calculation boating costs a few years ago and I too came close to listing the boat. It was a bad year for expenses, now while I track gallons per hour I never actually add up my expenses it is a number better left unknown!!!!
 
I have the opposite approach. We spend somewhere between $3,500 and $5,000 each year when we take 4 weeks off and trailer the boat to FL. 4 trips to the Abacos, 2 to the Keys. Most people spend that kind of money (or more) for one week of vacation. Heck, we just did a week on the Chesapeake and it was very affordable. I burned 61 gallons of fuel over the course of 10 hours (Baltimore to Solomons & back with other stops) at $4.20/gallon is $256. Dockage was around $350. So 8 days of vacation for $600 plus food.
 
You must log in or register to reply here.
Back
Top