[AT] B&S engine oil

[Ralph Goff]

On 11/10/2012 5:31 PM, charlie hill wrote:
> I don't understand the argument at all.  I thought the purpose of multi-vis
> oil was to maintain it's viscosity better over the entire heat range rather
> than be
> to thick when it's cold or to thin when it's hot.
>
> There was an argument going on around here where a lot of guys were saying
> some change in the oil manufacturing recently related to environmental
> issues
> was causing premature engine wear.
Probably referring to ZDDP. I was just reading an article about it a few 
days ago.
http://classiccars.about.com/od/maintenancetips/a/Zddp-Debunking-The-Urban-Legend-This-Motor-Oil-Additive.htm
It seems that the new oils lacking this ZDDP will cause accelerated wear 
on older engines especially during break in period.
On the single grade oil recommendation, I can't say why but my 90 series 
Case tractor has that same warning about using only single grade oils. I 
have stuck to that rule for over 7000 hours in that tractor although no 
doubt there are some that run multi grade oils without a problem. I just 
don't know but prefer to play it safe and follow manufacturers 
recommendations.

Ralph in Sask.
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