well as i mention earlier that there is no idle gas adjustment on local made gas kits , after doing that modification and setting a proper amount of gas for startup it will start on half crank even when its cold ,,,,,,,,,,,,,,i have even removed the gas tank right on the first day as i no need to run on petrol , in 3 years i dont remember it gave problem even for once ,,,,,,,,,,and i dont think engine oil can make such trouble , keep using good engine oil other wise engine will end up