So if the air filter was saturated, it was enrichening the mixture at the very least or possibly it was saturated because the carb was running over making raw fuel enter the crankcase. Sometimes just tipping the mower will contaminate the filter. To me, that is the place to start to know that whatever caused the rich condition is held at bay. Was the oil level reading overfull that you noticed (from fuel)? Oil doesn't lube the best w/ fuel in it, aluminum block engine= grey oil. Monitor the filter and oil level. If curious, warm it up good and change it again with SAE 30 and see what happens.

I had stalling problem not too long ago, grass kept getting stuck and jam the blade. I finally adjust the governor?? to increase the idle and that cure the problem. Grass blown into the bag much better and not jamming the blade.

You need to change oil more often!!! Every half a year!!! Unless you switch to synthetic oil. Aluminum engine alway make the oil grey. The first oil change on mine look silvery black!!! Make sure don't over fill.

If there is no oil filter, I wouldn't extend the oil change schedule if using synthetic oil.

I don't thing it has oil filter. I have the top of the line TroyBilt. THey use the cheap Quantum engine. It is the L head kind!!

I change oil every 4 months max with Mobil I 10-30. I only use it once a week or other week. Oil decompose with time too, not just with running. Oil is the single most important thing for engine life. Change often.

Grey oil could also come from water contamination if the mower was sprayed with water while the engine was running.

I thought it's like cars, oil and water turn into coffee creamy color.

Without actually seeing the oil we really don't know what color it is. Gasoline and water are the two most likely contaminants.

There is an oil that solves the aluminum residue in engines. It's called 'Opti-4' and I recommend the SAE 30. Its expensive, but for 20 ounces once a year anybody can afford it. This oil has the property of smoothing sliding metal surfaces by 'Eutectic' action. All oils have this to some degree, but Opti-4 really works. I have been using it for twenty years. The oil in my Tecumseh-engined Lawn-Boy does not get gray. After a year it gets a slight transparent brown. I hate to change it but I do anyway. It comes in 20 oz. bottles in six-packs.
The first new mower I tried this oil in was a 1989 Homelite/Jacobsen with 3.5 HP B&S. The mower is still in service at a relative's house and has had no internal engine repairs. I finally changed the spark plug after they nearly ruined it with old gas they had stored since Y2K! Now this mower admittedly has had light use, but twenty years is twenty years. Attached is apicture of it after I cleaned it up and got it running again after the gas incident. It has not been repainted.

Here is a link that might be useful: Homelite/Jacobsen

hey I'm new at this motor stuff my oil is great it's a 6.5 aftermarket Honda on a go-kart does it hurt it to drive it like that if I was running it or what was what was the bad here okay