Section 8.1 of the Operator's Manual addresses Engine Preservation.
Basically it says the cylinder walls won't corrode. The other suggestions are for "long out of service periods" to "protect the valve guides".
I have a 914 with over 1000 hours. I live in Michigan and based on a grass strip, so I normally don't fly from December until March or April. I always add Stabil to the fuel which is Mogas. My condition inspection is in Oct so the oil is pretty fresh. I disconnect the battery. In the Spring, I top up with fresh Mogas, connect the battery and go fly. This has been my procedure for over 10 years.
In Los Angeles I think you are fine with what you've done. When you get ready to fly, just burp it to check oil which will build some oil pressure prior to start. Then go fly
Jim Butcher