Someone asked me to recommend oil for under your mower deck. If you’re not familiar with this trick, it’s a good idea to oil the underside of your lawnmower deck to keep grass from sticking to it. This helps keep your blade from bogging down and your deck from rusting.
What oil do I like? The person brought up Marvel Mystery Oil. I do like Marvel Mystery Oil inside the mower. But I think it’s too expensive for the deck.
There’s no reason to get that fancy. What I recommend is the cheapest cooking spray you can find. It’s cheaper than Marvel Mystery Oil. And the nice spray can makes it really easy to apply. Just flip your mower over, spray down the deck, and you’re done in 30 seconds. And it’s super safe too. You never come in contact with the blade.
The oil under your mower deck isn’t lubricating a high-performance machine. Its job is just to make it harder for grass clippings to stick to the deck, and provide a bit of a barrier if any does.
Typically, a lawn mower deck rusts out before the mower’s engine goes. A mower can develop starting problems after as little as one season, but that’s due to gummed-up carburetors. Put some Marvel Mystery Oil in the tank and use 93 octane gas, and it takes years for the carburetor to gum up.
If you spray down the underside of your mower every once in a while with a garden hose to wash off the grass clippings, the deck doesn’t get much exposure to moisture. Spray some cooking oil there, and then even less grass can stick.
A $2 can of cooking spray makes a great oil for under your mower deck. It’s convenient, cost effective, and renewable. You can’t ask for much more than that.