Oil Found on Air Filter

Never heard of that before on this site about oil on the filter seal and not on the medium. But oil around the fuel injectors is probably leaking from the valve cover seal above it. Loose valve cover bolts.

If the rings are bad the plugs would be oily.......you changed them were they?

What's the mileage on the car?

 

If oil on threads you have a bad valve cover gasket. Oil leaking into spark plug wells.and running down side of motor. Pretty obvious.

 

I think you have a bad oil leak on the VC gasket. But a oem gasket from Toyota. Aftermarket is crap and well area will not fit perfectly.

 

I have the same little dab of oil in my throttle body. I believe some of that is normal due to the nature of the Atkinson cycle engine. But there is a recent thread here about installing an oil catch can to precipitate out the oil in the PCV system.

 

I know EXACTLY what that is! I kept taking my Prius to the same Toyota dealership every time I got an oil change including when it threw a code for the throttle body being stuck open. I read some advice about cleaning with carb cleaner due to any carbon buildup and found that exact same issue. I looked over my service riders (invoice) and they "filled 5 quarts of oil" on every oil change! Crank case is 3.9 quarts with the filter! I asked if they were lying to me about the oil or overcharging me? Turns out they were overfilling by a whole quart! $1,500.00 and a new throttle body later, it purrs like a kitten and I've had no problems since then! The excess oil drains through the PCV and dumps into the throttle body apparently. If you're not changing your own oil, I'd start there and see if extra oil is the cause.

 

Our previous Civic Hybrid was spec'd 3.2 liters with oil filter changed. Honda dealership routinely put in 4.0 liters. One sweet thing about our nearby dealership, even though I've never darkened their doorstep for an oil change: if you use the bulk Toyota oil, they dispense oil via a metered applicator, into large graduates. In other words, using the spec'd amount.

I've bought bulk Toyo oil from them, bring my own container, and it's always spot-on volume. The service writer looked at my container and said: "you know, this is the way to go". So, attitudes can change I think.

 

I wish I could get it bulk here. That would be great. Still, I found out that the dealer close to me charges only $3.95 per quart bottle of Toyota 0W20. Oil filter was cheaper than Amazon. From now on, I'm getting my oil change supplies from the local dealer.

 

If you've got oil on the threads, that means the valve cover gasket is already weak(brittle), from years of exposure to extreme temperatures.

Get the valve cover seals replaced, and that would solve that.

 

If you got some oil in the throttle assembly, I'm afraid, the engine oil capacity of 3/9L, must have being superseded. Did you over gauge the engine oil at some point in time?