Oil splash on rear left side of engine

add some uv dye to see where its coming from

 

are the fill cap and dipstick tight?

 

What's the mileage on the odometer? Engine warranty is 60mo./60k miles which covers seals and gaskets.

Semi common problem on the Gen 3 engine is a timing cover gasket oil leak.

 

I looked at our 2010 with 66,000 km: it's all dry/clean there.

Can't recall if I've mentioned before, but pcv valve clogging may cause crankcase pressure and maybe start pushing oil past seals? Maybe you've looked at that already though?

 

We have the same issue on our 2010 since before I started working on the car a couple years ago. I just leave it alone. It's either imperceptibly slow or old seepage that has stopped long ago. The engine burns about 1qt per 2500 miles and doesn't leak any oil on the floor or splash shield.

 

does the 2010 have the timing chain gasket?

 

Yes

 

isn't that a problematic area?

 

The timing chain cover isn't something you can take off without removing the engine, I think. At least it would be very difficult.

 

maybe some sealant?

 

Actually here's a video of someone replacing the seals on a similar engine (more like the Gen 2) without removing the whole thing:

.

 

LOL, I like how all the fasteners and bolts are all only "hand tight" and come off with ease.

 

Check out this thread I started:

Oil leak? | PriusChat

Looks exactly like mine.