Have you guys tried a used oil analysis?
I have been using amsoil synthetic, but
the guys at blackstone labs, who do
thousands of uoa's tell me to use
the cheapest oil I can find, and recomend
walmart oil, and to have it changed every
6months. That synthetic oil may last longer,
but if you buy the cheap oil and change every 6
months or 5000 miles, it protects the engine
just as well as synthetic.
Now if your doing extended oil drains, thats
a different story.
I change my oil onces a year, using amsoil series 2000 0-30wt
with k&n Oil Filter
, and my use oil analysis comes back
with flying colors, except in the silcon range, with is ok.
That means sand, which equals k&n Intake
filter. I love having
, but they really don't filter as well as a paper or oem
You guys should check out bob the used oil guy website. Everyone compares
their uoa's there. It seems that oil is oil, if just change it often, if not
then get the synthetics.