Boom,

I'll have to disagree on the synthetic being better than castor subject. Synthetics may be cleaner than castor/blended fuels, but the protection, whether it be in the air or stored in your garage, is nowhere close to being as good as castor. Sure, synthetics may protect an engine just fine, but that's as long as the engine's run at a reasonably rich setting. But, let that engine run just a slight bit lean, and the damage has already been done. Castor, on the other hand, will protect that engine at that lean setting, and no harm will be done at all. As for castor gumming up an engine, maybe, just maybe, if you're running total castor for a long period of time. I rest my case on that subject.

As for synthetics being better for an engine than castor during storage, I don't know this, but I'd say that castor would be better, simply because it's thicker, and adheres to the metal better. If you're getting rusty engines during storage from them being lubed with castor, something is bad wrong! You don't get a rusty engine from using castor, no matter if your garage is on ocean front property.

I'm not arguing with you, I'm just disagreeing strongly.

John