Originally Posted by Lonesome George
Ok Here's the thing. I just transported my BMW1200GS by air and the oil was drained. As soon as I got it out of the crate I poured in 10/40 engine oil. I usually use 20/50 but couldn't find any. Then I rode the bike (I've only done about 30 miles) . All good so far. But then I got thinking. I didn't change the oil filter and I assume there was some (20/50) oil in there so I've kind of mixed my oil.
Is that a problem? Should I change the whole thing again AND the filter (I hadn't chanegd the filter because it had only done 2200 miles) or is it Ok to mix a little?
That engine should be possible to run on either viscosity... 10/40 in less warm climate and 20/50 in hot climate.
You need not to worry at all -
Should you by chance fill SAE50 (straight oil) and plan to drive in my winter-climate,... then it would be smart, clever, intelligent, -moneysaving- to change to a mulitgrade 10/40 or 0-40
But that's another story