I recently left my car 88 Cabby sitting for a week. When I got back and started it oil pressure was low for good 30secs. Now ever since when I start theres few seconds no oil pressure(also can hear lifters clicking until pressure builds up. So I changed from 20w-50 to rotella 15w-40 which made it a little better and added lucas and if I dont start everyday there will be low pressure at start up.
There is 20k on engine with all new parts and I use the mann filter. Tomorrow I am switching to mahle filter and 5w-40 oil.
What do you guys think?