Mystery oil
I add a little Marvel Mystery oil to my RV fuel before I leave. Its a top engine lube that coats the upper head and cylinder. I have been using this for 40 years on all my gas engines back home. I rebuild those engines as well and know the difference.
I found a little simple trickle charger at harbor freight for 5.99 on sale.
I run several up north all winter on boats and heavy equipment, never an issue.
Bud
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