I don't have an owner's manual either, but according to the FAQ post
4 Simple Answers to 4 Most Common Questions... on the Savage/S40 forum, the guru's official recommendation is to use a 40 grade oil with whatever winter rating you want. Thus, their
current list of recommended oils is:
Dino -- Rotella T4 Triple Protection 15W40
Synthetic -- Rotella T-6 5W40
Synthetic -- Mobil 1 Racing 10w40
Synthetic -- Mobil 1 V Twin 20w50
As you can see, all 40 grade oils with winter grade ranging from 5W to 20W.
Overall, their preference is for the Roltella T4 15W-40 as it's cheap and works fine. All the others are also fine, but they are considered to be overkill and thus kind of a waste of money.
The overall preference for T4 can be seen in this
example post where they say "use T4 and shut down all the oil threads."
FWIW, I used to use Super Tech 10W-40 MC oil, and then switched to Rotella T4 15W-40. No problems (that I know of) with either.
2) spec'd OCI for this machine? thanks
Again, I don't have a manual, but according to
this post on the Savage/S40 forum, one guy says the manual recommends 3,500 mi OCI, another guy says the manual recommends 4,000 mi OCI. Don't know why the discrepancy or which one (or both?) is correct.
Also in that post, the poll of what forum members use for OCI shows that 3,000 miles is the most common.
FWIW, I do 3000-3500 miles (or annual) OCI.
You might consider joining the suzukisavage.com forum-- almost any information you need as a new owner will be there and will come from the gurus who have extensive experience with this bike, while that same information is much less likely to be found in this forum.
