- Joined
- Apr 3, 2023
- Messages
- 8
“Do not use oils of a diesel specification of “CD” or oils of a higher quality than specified.”
What a weird thing to say. What does “a higher quality” even mean?
This is from the owners manual of a 2016 Yamaha Zuma/BWS 125cc scooter. It goes on to warn against using energy conserving oils as well. (See pictures)
Now this would make sense to me if it was a wet clutch motorcycle. Friction modifiers are an obvious issue in that environment which is why other manufacturers list similar warnings for their wet clutch bikes. But the BWS has a dry clutch CVT, so what gives? What the diesel API hate?
Now I’ve gone on to email Yamaha in the hopes they can shed some light, but I don’t expect much of a reply beyond directing me to their proprietary mineral based house lubricant.
I’m looking to find an alternative for two reasons:
1. The recommended weight of 10W40 is *just* inadequate. Yamaha recommends it for temperatures ranging from -10 to +40 centigrade. Where I live a summer morning can be under 10 degrees, but by late afternoon that 40 mark is real close. And I run long, hard, and at WOT.
2. 20W50 is inadequate for cold starts. So I’m looking for a synthetic 10W40 that will provide an extra level of stability against those extra hot high speed runs. I was thinking the ester based Redline 10W40, but it meets API CF, which if I understand supersedes CD.
Thoughts? Is this a typo from Yamaha, a lazy copy from the manual of a wet-clutch bike?
What a weird thing to say. What does “a higher quality” even mean?
This is from the owners manual of a 2016 Yamaha Zuma/BWS 125cc scooter. It goes on to warn against using energy conserving oils as well. (See pictures)
Now this would make sense to me if it was a wet clutch motorcycle. Friction modifiers are an obvious issue in that environment which is why other manufacturers list similar warnings for their wet clutch bikes. But the BWS has a dry clutch CVT, so what gives? What the diesel API hate?
Now I’ve gone on to email Yamaha in the hopes they can shed some light, but I don’t expect much of a reply beyond directing me to their proprietary mineral based house lubricant.
I’m looking to find an alternative for two reasons:
1. The recommended weight of 10W40 is *just* inadequate. Yamaha recommends it for temperatures ranging from -10 to +40 centigrade. Where I live a summer morning can be under 10 degrees, but by late afternoon that 40 mark is real close. And I run long, hard, and at WOT.
2. 20W50 is inadequate for cold starts. So I’m looking for a synthetic 10W40 that will provide an extra level of stability against those extra hot high speed runs. I was thinking the ester based Redline 10W40, but it meets API CF, which if I understand supersedes CD.
Thoughts? Is this a typo from Yamaha, a lazy copy from the manual of a wet-clutch bike?