Interesting stuff. Sounds like 'soot' is kept in suspension better
than coventional oils designed for gas engines. The shear numbers look
good. Resistance to shear might make up for the 40 weight. Don't know
what other factors are in play in the gas vs diesel comparison.
Anyone?

15w50 Mobil1 is really hard to find this year for me. NLA?  Some 10w40
is still on the shelves which is what I ran last winter. Looking
around for alternatives.

John Meeks
'91 Vanagon MV Phoenix
Northern Michigan

Vanagon Rescue Squad
www.vanagonauts.

On Sun, May 13, 2012 at 3:49 PM, neil n <musomuso@gmail.com> wrote:
> Hi all.
>
> Searched �"Hypuron" in archives. Didn't get any hits.
>
> I don't know if the TBN and Low Ash aspects help a gas engine, but
> looking at "Oxidation Control & Shear Stability" here:
>
> http://www.castrol.com/castrol/genericarticle.do?categoryId=82915547&contentId=7025207
>
> seems this might be a decent oil with a good price balance between
> 100% synthetic and conventional oil.
>
> Has/is anyone using this product?
>
> When introducing a synthetic blend oil to a an engine that's been
> running NON synthetic, is there a high risk that the new oil will
> cause seals to leak?
>
> My goal isn't to extend oil change intervals. Just want to provide
> better protection for bearings etc.
>
>
> Neil.
>
> --
> Neil n
>
> 65 kb image Myford Ready For Assembly �http://tinyurl.com/64sx4rp
>
> '88 Slate Blue Westy to be named.
>
> '81 VanaJetta 2.0 "Jaco" �http://tubaneil.googlepages.com/
>
> Vanagon VAG Gas I4/VR Swap Google Group:
>
> http://groups.google.com/group/vanagons-with-vw-inline-4-cylinder-gas-engines