Well Im changing the oil in my Z tomorrow for the first time. The PO didn't really give me much info on when he last changed the oil or what he used so I figured I might as well start fresh. My Z is a 78 and it's currently at 199K miles.
I went ahead and bought 5 quarts of 10w30 Castrol Synthetic along with a quart of ATF to flush out the engine. I plan to add the ATF, change the oil filter with a generic one, run the engine for 5 minutes, drain oil, change filter with Mobil 1 filter, add the Castrol and call it a day.
Does anybody see any glaring problems with what I have proposed. I read previous topics on this and everybody said to do something similar. Should I be using high mileage oil especially since Im nearing 200k? Lady at the store said I might want to go that route but when she had her back turned I asked her manager and he told me synthetic would be better.... heh.
Thanks for any input whatsoever.