there are issues that can be remedied by a flush if the additive(s) are strong enough
. It is to use thoroughly filtered (3 micron media) said:You can never really be certain, that is why most will recommend additional fuel filtering such as a W/S before the stock filter, a good filter (i. e. , Baldwin PF7977) in the stock housing, and a 2-3 Mic filter (i. e. , Donaldson P551313) between the stock housing and the CP3.
I also run Stanadyne Performance in each tank. It separates the water, allowing the W/S to be more efficient in removing any water that may be in the fuel.