Need your opinions on a ongoing intermitten "ticking" from my Kohler 23 hp motor. Im sure its a lifter and it comes and goes. Motor has about 1000 hrs on it. Gets better after I change oil but a few hours, here comes that ticking again. I only use "Kohler Command SAE 10w 30. Should I use different oil? never adjusted lifters, could that help, not sure if there is adjustable (hydroulic lifters). Hate to onen her up the replace liters if change of oil and/or adjusting helps.