Gas vs. Propane: Which is Cheaper for Generators?

Is it cheaper to run a generator on gas or propane? Here’s a cost comparison using the Westinghouse 12,500 Watt Dual Fuel Generator at a 50% load. A full 6.6-gallon tank of gas provides 8 hours at around $2.60 per hour. A 20-pound propane tank runs for 7 hours, costing about $2.00 per hour. With propane, you save around 60 cents per hour, and it burns cleaner, which is better for your generator’s lifespan. Check out why propane is the winner for long-term savings and cleaner power!

Added 2 Apr 2026