Jim, I didnt mean to get wound up....My problem is that I have a dual sump pan that should have a rear sump dipstick, Unfortunately the car Has a
oil temp sensor in that location and a timing chain cover dipstick. So my factory markings are way off. I will modify the stick but I wondered how much
oil was needed before marking. I have no way of knowing how deep the
oil is in the pan. If the pan holds 5 qts and the filter holds 1 qt then when I drain it and replace filter I need 6 qts if no oil drains into the pan from the remote oil cooler and lines. If the oil cooler and lines actually drain a quart then I will need to use 7 qts then mark my dipstick. I guess my question is how much of the oil from the cooler and linesdrains when you pull the drain plugs (2 plugs in dual sump facotry pan) and yank the filter? I just thought somebody with a dual sump 5qt pan and oil cooler would let me know what it takes to change oil (how many quarts) so I could do it with some degree of certainty. The failsafe way would be to relocate the oil temp sending unit, plug the timing chain cover dipstick hole and run a rear sump dipstick but everything is plumbed and wired nicely and I hate to go changing things up. Sorry if I offended you, was not my intention.