RE: nitro
If we are gonna go that route, lets just say to use Pam cooking spray on the air filter, maybe add a drop of acetone for additional solvency. Next, flush the crankcase with vinegar to clean the goo out and follow up with wd40 mixed with karo syrup to protect the internals and use some Works toilet cleaner to remove the oil residue off the outside of the engine.
And yes, Traxxas recommended using WD40 for ARO. Now who is trying to sabotage users to sell more engines?