let's start an oil thread (lucas)

[Jeff Khoury]

#ygrps-yiv-1949332277 p {margin:0;}This article was written in the 90s, before the introduction of the API spec for "Energy Conserving II" oils.  These oils have Molybdenum friction reducers that can cause clutch slippage. Oils such as "High Mileage" oils and Synths like Castrol Edge have these additives.  Look carefully on the API seal for "Energy Conserving" and avoid those. I use Castrol SynTech 20w-50 without any problems at all. -Jeff Khoury Astatic Solutions, LLC.

----- Original Message ----- From: "kusstj" To: "DSN KLR650" DSN_KLR650@yahoogroups.com> Sent: Thursday, April 22, 2010 7:33:46 AM GMT -08:00 US/Canada Pacific Subject: [DSN_KLR650] Re: Let's start an oil thread (Lucas)   Very interesting read. However did I miss something. His basic premise (I think) is that he could find no evidence of differences in viscosity reduction in MC vs automotive oils, and he did test synthetics too. He calls out the demands of MC oil having to lube both the engine and the transmission, and thus the propensity to breakdown the chains of molecules requires a MC specific oil. He does not mention anywhere (unless I missed it) that some of the components of the auto specific oil may enable clutch slippage / wear/ glazing? This to me is a big puzzle piece to omit . . . Personally I have used every kind of oil imaginable, and for my use they all work fine, so my conclusion may be the same. but from an analytical perspective, the wet clutch effects are of extreme interest and his write up seems to omit this. maybe I missed something, I had to go through it quickly. Again, thanks much, - a very interesting read! todd A16 Chaska mn --- In DSN_KLR650%40yahoogroups.com, Robert Waters wrote: > > Has anyone used Lucas in your KLR?  At my last oil change I added 1/2-3/4 cup to the 15-40 Mobile oil for diesels.  The shifting is amazingly smooth.  In parts stores they sometimes have a demo that shows how that stuff sticks to the gears when turning.  I can just picture it working as I run through the gears.  Absolutely no missed gears when this stuff is fresh. > Robert Waters > >   > > Re: Let's start an oil thread > > Posted by: "Jeff > Khoury" > jeff@... >   > > DsrtEgl > > > > Wed Apr 21, 2010 8:38 pm (PDT) > > > > > > After reading the Motorcycle vs. Automotive oil article by that > Cal State Ph.D., I have used automotive oils in all my bikes, and full > synthetic wherever possible. > > > > The rationale is that the transmission gears present in common-sump > motorcycle engines tend to shear the long polymer chains of motor oil, > causing a rapid drop in viscosity. After all, it's the viscosity that > we're most concerned with, right? Synthetic oils resist these shearing > forces better than dead dinosaurs allowing one to go longer between > changes. > > > > The results of this study are particularly telling, because it turned > out that plain 'ol Castrol GTX automotive oil outperformed all the > motorcycle-specific oils during the test. > > > > I've mirrored the study on my MC related blog: > > > > http://www.dsrtegl. > com/2010/ 04/automotive- vs-motorcycle- oil.html > > > > -Jeff Khoury >