twice a year, delco 400   10/40

2.1 quart  or middle of sight glass.  which ever comes first.

I change oil at 1500mi  about 3 months
oil and filter at 3000mi  (I put on about 6000 a year)

takes a bit more than 2qt, I check sight glass.
10/40 SF/SG/SJ Valvoline 4 stroke motorcycle oil (PepBoys)

by then its coffee colored and not shifting gears as smoothly

As for me I only use "Castrol"motor cycle oil, same in my car,(not M/C oil) odd realy but I change the oil in my car every 2000
and I always change the filter as well,on the Savage I change every 500 miles and the filter every other time,just a personal thing I guess,no particular reason.
However I do have a reason for using only "Castrol" on my trips to the Isle of man,my Dad was hired by Castrol to show a short movie promoting the product,he showed it 3 or four times a day in the cocoa tent,it's where I learned my first long word "Viscosity" all through  the movie (15 mins) the guy must say "High viscosity index" 25 times ,and I guess it stuck,at that time most riders used it along with "Avon tires", Dunlop was the biggie for tires until a rider got killed after the tread came off his front tire,then every one switched to Avon,  A big blow to Dunlop at that time.
Interesting that all riders at that time used "Castrol R"
the R for racing,it was a vegatable oil,it had a very high viscosity,the only problem with it was that you had to completly strip down the engine after each race otherwise it would turn to gum,I don't think they use it anymore,used to smell great out the exaust.

For those of you operating in metric countries and didn't get a manual when you acquired your steed its 1.8litres to fill on a change when you don't change the filter.  Suzuki recommend a filter change every other oil change.

Posted by: smokey02      Posted on: Today at 03:29

Spike, I'm not really worried that the oils gonna wear out.  
More concerned that it gets dirty and contaminated.

Thats why they say to change the filter regularly. The darkness of the oil just shows it's working plus when oil is heated it will turn dark.
Never tried Castrol, might have to give it a whirl.  Will have to try my hand at the search and see if I get the right key words.Thx

Yes used to run R30 in my 350 LC and put a little in the tank of KLX.

Clive W  

Oil, in fact, does "wear out".  Some of the signs of "worn out oil" are sludge formation, foaming (not perceptible to the rider), allowance of rust inside the engine, decreased viscosity, oil lose due to burning/evaporation, and diminished ability to hold dirt particles away from wear surfaces.

Synthetic oil can usually help some of these "signs" but a high quality detergent package is necessary (which most manufacturers don't include.)

Synthetic oil itself will not break down like dyno-juice, but ALL detergent packages break down over time/use.  Its not a matter if "IF", just "WHEN".