Originally Posted by Turbojack (Post 2430330)

Used to run compressors, generators and pumps in the oil field and other places. I think the AC compressor at the Denver airport has one or a number of these engines.Can produce almost up to 5000Hp 24/7

Specs on the V18 is

Dry weight 43,652 lbs
164.2l displacment
11:1 compression ratio
215 gallons oil capacity

Here is picture of one of the smaller ones.