I ride a 1980 XS850 for which I recently picked up some M1 10w40 to run. Now I have no roi t this oil will perform excellent for me but I wonder if it isn't overkill. Ill be mostly commuting city and highway traffic in temps between 40f and 100f, though the occasional early morning commute may be a bit cooler early or late in the season. The bike runs well and only has 20k with no overly troublesome oil consumption.
Now the m1 vs synpower vs valvoline dino at 40C is 82.0, 95.4 and 104.1 respectively (with 100C gaily close at 13.1 14.1 and 15.2) as well as base vi of 161, 152 and 155.
I figure all three should work well at or close to operating temp and last decently in my shared sump and wet clutch but I want to ensure good low temp performance for those mornings where there isn't time to allow a good warm up before taking off. Did I over buy? The M1 is a tad more costly than other synthetics and naturally a lot more than a conventional but I'm thinking it might be worth it...
Now the m1 vs synpower vs valvoline dino at 40C is 82.0, 95.4 and 104.1 respectively (with 100C gaily close at 13.1 14.1 and 15.2) as well as base vi of 161, 152 and 155.
I figure all three should work well at or close to operating temp and last decently in my shared sump and wet clutch but I want to ensure good low temp performance for those mornings where there isn't time to allow a good warm up before taking off. Did I over buy? The M1 is a tad more costly than other synthetics and naturally a lot more than a conventional but I'm thinking it might be worth it...
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