i spent around 72 changing O-rings on my truck, for those who dont know what they are pretty much what stops more than enough oil mixing with gas (more important on diesels, like mine), so youre oil level will always be about 1 quart which is extremely low, i had to take my 8 injectors out (where the o-rings go, and my truck is a v8), clean the injectors, take the old o-rings out which took 3 nights itself, as i was working about 6 hours a night, then put new ones in, put the injectors back together, and put them back in my truck
and its just my luck that i left a mirror in there while putting an injector back in, so that went flying right through the hood so i need a new one
atleast it was free, even though i stayed up til about 2 am each time...