ORIGINAL: RickP
Ryan,
Where did you hear that? I heard that running ashless is not good for the motor over the long haul since it builds up carbon and is not neccessary? Perhaps I should put a call into DA?
I've got only one more flight before I switch to the 100:1 (4 gallons)
RickP
DA recommends the ashless for a short period during break in. Its in their documentation. I believe BME also recommends the same, as do a few others.
You are right that over the long haul, the ashless oils tend to build up carbon deposits. These can be cleaned out very easily, and does take a fair amount of time to get to this point. Overall, its not harmful to the motors, but does increase the maintenance to clean out the deposits every so often. However, the ashless oil is only recommended for a few gallons, which isn't enough to leave any carbon build up. That usually takes quite a few seasons worth of flying to get any significant build up that requires cleaning.