Posted by Chris Case [108.247.159.195] on Tuesday, September 03, 2013 at 08:01:58 :
In Reply to: been sitting a while, need to start posted by junkyardog [72.64.1.204] on Tuesday, September 03, 2013 at 02:27:27 :
At least you shouldn't put detergent oil in an old crank case that has a lot of gunk built up. The det will pick up soooo much gunk things will plug up.
So far as viscosity, a good tight engine can use lighter oil. There is no differences in oil clearances except fro wear.
So far a multi-weight, oils all get as thin as water at running temperature. Difference between 10-30 and 10-40 would be negligible.
That's my opinion, and this being the interwebs, you have a right to it. ;^)