SL is newer and very much ok where SE or SF is specified. You see, "L"
comes after "E" or "F". The oils are always backwards compatible.

--
Steve Barker







"Toller" wrote in message
...
My understanding is that you have to use motor oil that "at least" meets
the auto manufacturer's requirement, but would that be true for a
generator also?

I got my Yamaha EF1000 today. The instructions call for SE or SF oil; all
I had was SL. Is there any reason that might not be okay?

I know, "Call Yamaha". I had to call them three times to verify that a
claim made in one of their retailer's ads (that it will do 3500w for 3
seconds) was accurate; I doubt I can actually reach anyone there who knows
what oil is. Not that Yamaha doesn't know what oil is; they just don't
let those people talk to customers.

Thanks.