Originally Posted By: ltslimjim
Originally Posted By: daves66nova
would adding a whole can of b-12 help?
Do not do that. IF you are trying to clean up internally, on such an old engine, do it slowly by using something like MMO, but only for the last 500-1,000 miles as it thins down the oil you are using(which isn't preferable in an older/worn engine) as some do use the 1 QT replacement during entire OCI which is fine for those types of applications.
The reason I bring up MMO? It's a slower clean and it's respected on this site. There are other options though, but I would just stick a good HM oil in there with a good oil filter and be happy.
As a side note, I have used Amsoil's Engine/Tranny flush product just prior to an oil change, but IMO it really only helps with entry level carbon deposits and it's not designed to break down sludge like a mechanic in a can, just knocks the 'top' off if you will...in other words it's only good to use on a relatively clean engine already.
+1 i would not use b12 or anything like that, mmo is a solid product. just use one qt with 4 qts oil for a 2-3k oci.
there are other options as well like Pennzoil Ultra for cleaning up sludge. Mobil1 High Mileage is good at cleaning too and will help with seals.