Its a 1.9L S Series, over 130k mi. Both of my Saturns use some oil. Not huge amounts, but more than 1 qt per 1000 mi. The one had a timing chain type noise as well as lifters clacking bad at startup, and improving after warmup.
I managed to fix the lifter clacking by running Seafoam in the oil and then when it got dirty, flushing with Gold Eagle engine flush (no kerosene), and refilling with 5W30 and a fresh filter, and another round of Seafoam. After 2500 mi and 2 oil changes the clacking is gone normally and I only get a little bit of it after a completely cold startup. Its also supposed to clean rings which are a known problem on Saturn's. After my test of cleaning ability showed MMO to do better than the Seafoam at cleaning baked on varnish and crud, and the fact that its 1/2 the price of Seafoam, I decided to go with 1/2 qt of MMO at each OCI to continue to clean the crud out and keep it clean.
What seemed to fix the chain noise was some Rislone Engine Treatment. Its also supposed to clean lifters and rings. As with the MMO, I will add 1/2 qt at each OCI.
What reduced the oil consumption was 1/2 bottle of Casite Motor Honey. Its basically a cheap thickener from the looks of it, but unlike most other cheap thickeners it supposedly reduces friction. If it was still avail I'd be using VSOT, and if money was no object, it would be Shaeffers #132, but these are old Saturns, not worth putting big money into, just want to keep them running reasonably at a low cost.
I managed to fix the lifter clacking by running Seafoam in the oil and then when it got dirty, flushing with Gold Eagle engine flush (no kerosene), and refilling with 5W30 and a fresh filter, and another round of Seafoam. After 2500 mi and 2 oil changes the clacking is gone normally and I only get a little bit of it after a completely cold startup. Its also supposed to clean rings which are a known problem on Saturn's. After my test of cleaning ability showed MMO to do better than the Seafoam at cleaning baked on varnish and crud, and the fact that its 1/2 the price of Seafoam, I decided to go with 1/2 qt of MMO at each OCI to continue to clean the crud out and keep it clean.
What seemed to fix the chain noise was some Rislone Engine Treatment. Its also supposed to clean lifters and rings. As with the MMO, I will add 1/2 qt at each OCI.
What reduced the oil consumption was 1/2 bottle of Casite Motor Honey. Its basically a cheap thickener from the looks of it, but unlike most other cheap thickeners it supposedly reduces friction. If it was still avail I'd be using VSOT, and if money was no object, it would be Shaeffers #132, but these are old Saturns, not worth putting big money into, just want to keep them running reasonably at a low cost.