Synthetic Oils?

[earlfor]

The GS650G uses engine oil in the transmission, fed by the engine oil pump. But it's a strange transmission.

It used to be common with a lot of vehicles. My MGA used engine oil in the transmission also.

Earl

[eddiev]

Perhaps he's thinking of the gear oil for shafties.

Yeah, that may be it. I know I have changed the gear oil in both my final drive and the trans. I do have a shaft drive gs1100.

I guess your saying the chain drives use the motor oil in the gears also. Wow. I didn't know that. Thanks.
Eddie V

[charger71798]

Which oils meet the JASO MA/MA-2 spec? I know Amsoil does but anyone else?

Keep in mind that in order for an oil to meet the spec, it needs to be tested for the spec. Testing costs a lot of $$, so oil manufacturers aren't going to spend the money testing unless it will help them increase sales and offset the cost. For example, diesel engine oil makers are not going to spend money testing their oil to some motorcycle specific test criteria since 99% of their oil is used in HD truck applications.

Nessism, I will say more. I first want to say that I use a lot of your suggestions in a lot of areas. The diesel oil does have a JASO DH-1 rating other motorcycle oils with the JASO MA and SAE 80w90 API GL-1 ratings should be: Bel-Ray EXS, Castrol GPS, Golden Spectro 4, Lucas H.P. Motorcycle, Maxima Maxum 4, Mobil 1 MX4T, Motul 300V Sport, Pennzoil Motorcycle, Royal Purple Max-cycle, TorcoT-4SR, Valvoline 4-Stroke

[Nessism]

Nessism, I will say more. I first want to say that I use a lot of your suggestions in a lot of areas. The diesel oil does have a JASO DH-1 rating other motorcycle oils with the JASO MA and SAE 80w90 API GL-1 ratings should be: Bel-Ray EXS, Castrol GPS, Golden Spectro 4, Lucas H.P. Motorcycle, Maxima Maxum 4, Mobil 1 MX4T, Motul 300V Sport, Pennzoil Motorcycle, Royal Purple Max-cycle, TorcoT-4SR, Valvoline 4-Stroke

Sorry if this comes across like I'm trying to win an argument, that is not my intention.

I just checked the web sites for Bel-Ray, Castrol, Lucas, and Maxima and none of these oils are rated GL-1. I got tired of checking after that so not sure about the other oils. Does this mean these are bad oils? Of course not. Another thing, all of these oils are very expensive - $8/quart or more.

I'll take diesel engine oil for $12/gallon thank you. It has a heavy duty additive package designed to protect commercial trucks with engines that cost tens of thousands of dollars. No, these oils are not MA rated for motorcycle clutches. Doesn't mean they will cause clutch problems though, just that they were not tested.

[charger71798]

Sorry if this comes across like I'm trying to win an argument, that is not my intention.

I just checked the web sites for Bel-Ray, Castrol, Lucas, and Maxima and none of these oils are rated GL-1. I got tired of checking after that so not sure about the other oils. Does this mean these are bad oils? Of course not. Another thing, all of these oils are very expensive - $8/quart or more.

I'll take diesel engine oil for $12/gallon thank you. It has a heavy duty additive package designed to protect commercial trucks with engines that cost tens of thousands of dollars. No, these oils are not MA rated for motorcycle clutches. Doesn't mean they will cause clutch problems though, just that they were not tested.

I hear ya loud & clear.