I have been asked to help these motors last longer, many are inlines and many bents here in coal bed methane wells, the problem is the deposits from basically running these engines is with methane they run them with basically coming raw out of the ground with no processing and they just get alot of deposits in the heads and then the valves go, both exhaust and intake, I have seen an intake almost plugged once the intake goes bad, but not as bad on the exhaust, I was just wondering if running a higher engine temp around 210 would help this problem, I knew a mail route runner when I was younger who ran propane at these temps and he got 300,00 out of a 292 chevy and when we tore the motor down it was extremely clean, I wonder if higher temps would help burn up the contaminates in the methane which is basically natural gas and no they don't want to try and process it better before it gets to these engines because they feel it is not as cost effective because of how long these motors actually last. 180 to 210 is 30 degrees, does anybody think this will help, I'm certain I can set up a test motor.