From: Eat Dirt on
On Apr 15, 10:17 am, JayC <j...(a)sysmatrix.net> wrote:
> On Apr 14, 11:11 pm, Eat Dirt <eatdirt...(a)gmail.com> wrote:
>
> > Time to do an oil/filter change on the DRZ400 and wonder if I should
> > go with semi synthetic or just normal SAE10-40. Manual recommends
> > 10-40 and makes no mention of anything synthetic. Are there pros/cons
> > for either? I use the bike almost strictly in the streets and hardly
> > any highway use or speeds in excess of 110 km/h (in case this matters)
>
> Use any 10W-40, they're all pretty much the same.  I use SuperTech
> (WalMart brand) 10W-40 in just about everything (except my CRF).
> SuperTech tested out as a decent (not great) oil, but is right up
> there with most of the name brands at half the price.  If you change
> oil before it gets real dirty (like you should anyhow), lubrication
> longevity is not an issue.
>
> JayC

Funny you should mention the Walzymart 10-40 oil as just week I
replaced the oil in the GZp305 with that very oil. It only cost $2/
litre. I was thinking in using it for the DRZ but wasn't sure if it's
best to go with semi for that nicer, newer bike (which by now has
almost 6,000 km). I suppose that as long as the oil is changed at
around 2,000 to 2,500 km that any cheaper 10-40 ought to do. So yeah,
unless someone can tell me otherwise I'll just use this very oil. It
seems to be working fine with the other bike. thanks.
From: JayC on
> I suppose that as long as the oil is changed at
> around 2,000 to 2,500 km that any cheaper 10-40 ought to do.

I'm thinking more like 500-1000km at the most. I wouldn't run ANY oil
longer than that.

JayC
From: Eat Dirt on
On Apr 15, 1:19 pm, JayC <j...(a)sysmatrix.net> wrote:
> I'm thinking more like 500-1000km at the most.  I wouldn't run ANY oil
> longer than that.
>
> JayC

Isn't that overkill? Well, maybe not on the 25 year old GPz where the
new oil/filter is already darkening after just a few days. But the oil
in the DRZ appears as clear as back when it was last changed, some
2,400 km ago. I suppose the old engine isn't holding up as well and
may require more frequent changes but one should be able to go a good
2,000 on a new engine, no?
From: Eat Dirt on
On Apr 15, 10:17 am, JayC <j...(a)sysmatrix.net> wrote:
 I use SuperTech
> (WalMart brand) 10W-40 in just about everything (except my CRF).

Would you use that on a 2 stroke 250cc bike? I hate the idea of
spending $12 on so called 'gear saver' when a 10-40 oil that doesn't
have detergent added to should work just as well. What if any
detergent is added to the Walzymart 10-40?
I think I last used Castrol 10-40 and it seems to be working well, I
don't get any slippage.

Charles/Working Dog - what do you use on your YZ?
From: Tiago Rocha on
On Apr 15, 4:51 pm, Eat Dirt <eatdirt...(a)gmail.com> wrote:
> On Apr 15, 1:19 pm, JayC <j...(a)sysmatrix.net> wrote:
>
> > I'm thinking more like 500-1000km at the most. I wouldn't run ANY oil
> > longer than that.
>
> > JayC
>
> Isn't that overkill? Well, maybe not on the 25 year old GPz where the
> new oil/filter is already darkening after just a few days. But the oil
> in the DRZ appears as clear as back when it was last changed, some
> 2,400 km ago. I suppose the old engine isn't holding up as well and
> may require more frequent changes but one should be able to go a good
> 2,000 on a new engine, no?


oil, cheap. engine, expensive.
worry less, live more.

btw, I only use Shell Helix 15w50, change when I feel the need, that
happens no more than after 1000km after last change. XR250 currently,
lots of other singles two and four strokes before, same oil...

oil gets dark because rings wear and let combustion gasses seep into
bottom end. New engine, new rings, oil clear, old engine, old rings,
black oil... Valve seals plays a little role on that too... Crud that
accumulates in the cases also contributes to turn the oil black... New
engine, no crud, old engines that have seen lots of different types of
oil and change periods have more probability to have crud.

oil discussion is kind of like religion discussion... Everybody is
right and wrong at the same time...

-- Tiago
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