Tom, you have to figure that a normal cremation involves 1600-1700 degrees for 2 hours...I saw a statistic somewhere that if you're burning fuel oil, count on 45-50 gallons, don't recall how much propane or natural gas it would take. You burn a lot of fuel, and throw all sorts of things up the exhaust, including mercury from dental fillings.

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2002 Ford ZX2
2 x 2013 Honda Civics