Originally Posted By: BrocLuno
Originally Posted By: kschachn
Originally Posted By: BrocLuno
AND, even Blackstone among others will explain long and hard how
you do not use synthetics in aviation or marine engines until they are thoroughly broken in. Usually not until after the third oil change. There are drawbacks to using synthetics, even though there are sometimes advantages. It depends on the job at hand. There is no one-size-fits-all here ...
I assume you mean piston engines in general aviation, as turbine engines use only synthetic oils. Not that I'd listen to Blackstone for my airplane though.
So what GA piston engine synthetic oils are there?
Yeah, I mean piston engines as there are no turbine cars or trucks in the general market
There are no synthetic GA oils that I know of. But there are parts of synthetic sequences used in multi-grades and they are still frowned upon too for break-in. There are some OK's for use after well broken in.
I know this does not answer the OP's question. But you have to wonder why whole industries shy away from synthetics ...
FULLY Synthetics aren't used aircraft reciprocating engine oils, because of trauma in the industry remmember Mobil 1 Aero EO with high Pao content gave a lot of headaches i the 90's.
High PAo based oils don't cope with lead sludge, by lack of branched molecules to maintain dispersion , so semisyn is in use nowadays on base.