In a wet clutch motorbike you also get oil contamination from particles off the friction plates as they wear , so it can make the oil turn black quicker than in a dry clutch bike or car
Going back to the OP, what you are looking for on car oil bottles is the phrase 'energy saving' - if the oil bottle/can has this on it, then it will contain friction modifiers as Mollydog mentions.
The DR650 is not fussy on oil, obviously its better to run it on good synthetic , but for a while its no issue, I change the oil on my DR at 5000kms/3000 miles or sooner if I find good oil at a reasonable price, Id rather run clean new good quality dino oil instead of synthetic that has done high miles.
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