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Q: oil checking on 2004 Mazda RX-8

Rookie cbe0621eac06868b3efe0d8d1d3611e23c60d3114864ea2ec19a68cfbd3eebab
when cheking oil. condensation noted a white film around opening of oil cap and on dipstick
(1) Answer
That's probably OK, try checking for the condensation when the engine hot right after a good run. I don't think you should see signs of water then. If you do, I'd want to check out the crankcase vintilation system to be sure it's clean and clear.
I think the weather's been wet and cold in your parts so some condensation is fairly normal. If you see any signs of coolant, that's another story.