Adjusting the oven to 250C just because it's faster. If you use tempgun to measure the real temp. is about 200C.
There are a few engine parts need to maintain regularly.
1)Conrod;2)Bearings;3)Crankpin;4)Piston Wrist Pin
Most died engines were broken due to those wearing parts.
If people can maintain them regularly,Mfg can't take money from your wallet too much.....