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Old 05-27-2018, 06:14 AM
  #7  
Badbagger
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Join Date: Nov 2011
Location: Perdido Key
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Originally Posted by ReelPlumber View Post
Just curious.
Why diesel? Diesel fuel sitting grows alge, condensation builds up, etc. Unless you have a fuel polishing system with it.
Why not go with propane?
Diesels engines operate at 1800 RPM. The propane genset engines run at 3600 RPM, are air cooled and use an aluminum block and the maintenance costs are considerably higher and the lifespan is considerably shorter than diesel. The maintenance on the propane gensets are considerably higher due to wear in those engines means you have to change the oil every 100 hours. Diesel gensets require an oil change every 500 hours. To put this into perspective if you had an extended power outage, do you want to worry about an oil change every 4 running days or every 20 running days? Personally I wouldn't want to have to change oil on a generator is the middle of a week long plus outage. The life expectancy of a diesel genset is about 20,000 hours, the propane is about 10,000 hours. Look at what a generator costs to run for one day. A $5000.00 Propane Generator / 3000 hours life x 24 hours = $40.00 a day A $10,000.00 Diesel Generator / 20,000 hours life x 24 hours = $12.00 a day.

Fuel cost, here is where the DIFFERENCE really is if you want to toss everything else out the window. As of April 1st, the average residential price per gallon of propane was $4.70. A propane genset will use just about 4 gallons per hour X 24 hours totals $451.20. During an extended 7 day power outage you are looking at $451.20 per day X 7 days or $3,158.40 in FUEL alone. DIESEL, the current average price per gallon based on a Google search is $3.21. Dieesl gensets burn on average 1.3 gallons per hour X 24 hours based on the $3.21 = $100.08 per day X 7 days $700.56. You could run the diesel genset for a full month for what it will cost you to run the propane genset for one week.

Diesel degradation is a concern yes. Did some reading and Exxon stated that diesel that is PROPERLY stored will last 6 months to a year without any significant degradation. If it's properly stored and in our case in an above ground tank and we add in Diesel Sta-Bil it will help to control the degradation. So that is why we are going diesel.
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