But it doesn't have the viscosity of pure 10 weight. It has it's own curve.
10W40 sort of approaches the viscosity of 40 weight at the higher
temperatures and 10 weight at the colder extremes. Basically it has a
shallower slope at all points in the temperature vs. viscosity curve. I
don't have my fluid textbook handy (it's at work) so I can't give
particulars. My question was really if anyone has had issues if they've used
10W40 regularly. I'd be surprised if they did because the 20W40 and 10W40
curves are relatively close, but I'm just checking.
-----Original Message-----
From: GTS-1000 Owners List [mailto:[EMAIL PROTECTED]]On Behalf
Of [EMAIL PROTECTED]
Sent: Friday, July 27, 2001 9:44 PM
To: [EMAIL PROTECTED]
Subject: Re: engine oil
Yamaha chooses to limit the range of viscosity its oils cover for one main
reason. An oil has to have modifiers added to it to make it meet the specs
of
multiple viscosities. Yamaha feels that the advantages of extending the
viscosity range are negated by the use of the additional modifiers. In warm
weather, you should not need any oil that has a viscosity of 10.
RSRBOB
