I don't need to do any maintenance, but I do it to protect my investment. Not sure why you think that failing to change oil will not cause sludge build up, goo

I don't need to do any maintenance, but I do it to protect my investment. Not sure why you think that failing to change oil will not cause sludge build up, google 'engine sludge' and every result will say the most common cause is failing to change oil. https://en.wikipedia.org/wiki/Oil_sludge https://en.wikipedia.org/wiki/Oil_sludge > Oil sludge that causes an engine to run poorly or even seize is a rare occurrence and typically happens only when oil changes have been neglected or if the car has been driven extensively with an extremely low oil level. > Ways to minimize sludge production and accumulation include performing frequent oil changes, performing mechanized engine flushing or de-sludging, using synthetic oil,[1] and following the manufacturer's engine maintenance routine. https://www.consumerreports.org/cro/cars/car-parts-and-accessories/engine-sludge/index.htm https://www.consumerreports.org/cro/cars/car-parts-and-acces... > While sludge often results from poor upkeep, notably not changing the oil at prescribed intervals, some engines appear more prone to sludge buildup than others.