We have three 550's with the V-10 gas engine, 2013, 2017 & 2018.
They run well, get about 7-8 mpg.
They don't have the power of the 8.1 Chevy's they replaced.
The 2013 dropped a valve at 130k and got a new engine, the other two running fine with about 90 k on the clock now
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