Hi,Ken! I've not seen any non-detergent synthetic,but if anyone makes it,I'd say it would be AMSOIL brand,because they are big farm suppliers.So if you must have synthetic that's non-detergent,ask them.All the big companies have what is called`TECH SERVICE' people who are their chemical or products experts.Make sure you ask for their TECH SERVICE expert.I run regular synthetic EXXON 5W-50 which is the consistency of 30-35 WT. oil and I never have problems with the Morini or Minnarelli engines.The 50 wt. side scares some mechanics away because they think of the old THICK 50wt. conventional oils.Those were lacking flowability.BUT the new synthetics have that rating because of their superior resistance to thinning out at high engine or tranny temps.I use 5w-50 synthetic winter and summer in 3 cars,2 mopeds ,and a backhoe,along with my mowers.That way I know that I'm giving my gearboxes and engines the best wear protection.
Re: watch the tranny oil
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