Accidentally used 10w-30 Mobil 1 synthetic...

...instead of 10w-40 Mobil 1 synthetic for motorcycles. Only noticed my mistake after I'd changed the oil. I understand there may be some issues with clutch slip/wear? Do I need to change the oil? Kicking myself...

I doubt it. Just change it early.
Steve

Zaddict wrote: ...instead of 10w-40 Mobil 1 synthetic for motorcycles. Only noticed my mistake after I'd changed the oil. I understand there may be some issues with clutch slip/wear? Do I need to change the oil? Kicking myself...

If the oil in your bike is meant for newer cars with catalytic converter, AND the container talks about friction modifiers and is NOT meant for a wet clutch then change it now. These car oils have little or no zinc and that is a bad thing.
OR listen to Steve :pinch:
Dave

Since you caught it right at least you could use it in your car..... that's what I use in mine only 5/30.

I ran modern oil in my bike for a year then switched to Rotilla. No damage but the bike burned oil then stopped.
Steve

Zaddict wrote: ...instead of 10w-40 Mobil 1 synthetic for motorcycles. Only noticed my mistake after I'd changed the oil. I understand there may be some issues with clutch slip/wear? Do I need to change the oil? Kicking myself...

If it says "energy conserving" on the can you need to dump it because it has the moly in it that can screw up a clutch. Check the can.

Street Fighter LTD wrote: These car oils have little or no zinc and that is a bad thing.

But it's easy to add.

OK, thanks for the advice all. I didn't see "energy conserving" on the label and the bike seems to be riding fine. I think I'll take Steve's advice and just change the oil early.

Cheers,
Mark

Zaddict wrote: OK, thanks for the advice all. I didn't see "energy conserving" on the label

I think you dodged a bullet. One thing to consider, it probably is low on zinc. If you want to run it a while (I would) you can bump the zinc maybe 600 - 800 ppm by dumping in half a can of STP oil treatment (the high mileage stuff). Most car oils now have about 600 ppm so a 600 ppm increase takes it up to where it should be. The STP will also bump the viscosity of the oil a bit and make 10-30 more like 15-35 which is closer to what you want anyway.

The OP says Mobil 1 for motorcycles. If that is true, there is no problem.

Meh, looks like I spoke too soon - doublechecked the label and it didn't say "energy conserving" but it did say "resource conserving", which apparently is the new and improved energy conserving.
I'll replace the oil and put the 10W-30 in my Land Cruiser. No big deal, I think.
I did take the bike out for a quick ride and didn't notice any difference; other than the fact that it's running great after putting in new jets. Will be installing a Kerker exhaust next weekend

You may have to go up a step on the pilots and mains.
Steve