Re no oil change. whats the worst that happens with no car engine oil change and when?

just curious. does the oil become so degraded and sludgy that it can not be fed back up to the top of the engine etc. what are your thoughts and experience perhaps? sources? weblinks?Re no oil change. whats the worst that happens with no car engine oil change and when?
yes my friends car had a piston shoot through the engine, after her ex gave the car back he hadnt changed the oil for 2 yearsRe no oil change. whats the worst that happens with no car engine oil change and when?
I worked at an automotive machine shop some time ago. A mechanic brought in a motor from a Chevy Astro van. Claimed it had 40,000 miles on it, that the owner who had bought it new had never changed the oil because he was planning on trading it in 2 years. The motor had a spun rod bearing, was completely worn out and was the filthiest engine that I had ever seen. And I have seen A LOT of engines. Turns out that he had run on hard times and hadn't been able to trade the van after all, but never bothered to start changing the oil. Required a crank and a rod, new valves and guides, bore job and new pistons. Bill from us was probably 600. Plus the mechanic for removal and replacement and teardown and reassembly of the motor. If he had changed the oil every 4000 miles (oil change at Wal Mart at the time was about 15 dollars) it would have cost him 150. As it was, it probably cost him well over 1500. And this was 15 years ago.
Are you the same guy with the Mercedes??? Don't be stingy about oil changes. It's the one single thing you can do to prevent future trouble. Have someone evaluate the condition of your engines current amount of sludging, de-sludge it, and use Mobil 0W-40. Change it once a year. You should be covered.
It will sludge up and become so thick that it won't circulate or lubricate. I've seen it happen many times when the oil has been neglected. Engine seizure happens.
ruin the engine, could be up to a 10,000 dollar repair bill....
Yeah,i had this probelem before and i just changed the filter and oil evry few hundred miles till i could see the rocker arms shine again so change it frequntly util it's all clean again,then chage every 3000 mi or 3 months what ever comes 1st.