Originally Posted By: addyguy
I would NOT flush that engine.
I'd run Rotella T6 5W-40 of Delvac 1 5W-40 in it at short change intervals to do some slow cleaning.
Like others have said, for a 50+ year old engine, it is in pretty darn good shape - don't jinx it!
I agree on this one. Use T6 of Delvac 1, but if the OP wanted to add Kreen or MMO for the last 1,000 miles on a 2nd or 3rd OCI once on a good HDEO I don't think those will be an issue.
I would NOT flush that engine.
I'd run Rotella T6 5W-40 of Delvac 1 5W-40 in it at short change intervals to do some slow cleaning.
Like others have said, for a 50+ year old engine, it is in pretty darn good shape - don't jinx it!
I agree on this one. Use T6 of Delvac 1, but if the OP wanted to add Kreen or MMO for the last 1,000 miles on a 2nd or 3rd OCI once on a good HDEO I don't think those will be an issue.