let me try and explain
TXflyguy, Shell rotella is a diesel engine oil. Most all diesel oils are both detergent and dispersants. All contain ash as an additive. I am not sure from your post if your using an aviation engine (lycom,Cont) or something other. If something other than you could use the rotella. I am in the oil industry don't recommend any synthetic oil in aviation engines until the lead is removed from Low lead, which really has a lot of lead in it. Read all the information on Moblie 1 in aviation engine it all applies. That is why both Exxon and Shell are synthetic blends. Exxon is I think 50% synthetic and Shell 75%. You need the petroleum help scavenge lead away.I found your original post and I would not use any auto/diesel oils with LL. The problem is the FUEL.
Last edited by jim etcheverry : 08-07-2017 at 04:55 PM.