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From: Eat Dirt on 14 Apr 2008 23:11
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)


From: XR650L_Dave on 15 Apr 2008 09:34
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)



1st thing on synth, steer clear until the bike is fully broken in.

Then select what type of synthetic carefully, too much of certain
additives, and you'll get a slipping clutch.

I'm not the guru about which synth is best, or what the dangerous
additive package is. I do know mobil1 used to be safe, but now that's
in question.

I was a rotella diesel oil man myself, then they started added bad-for-
wet-clutch friction modifiers to that, so I'm back to castrol 10w40.

Dave
From: HardWorkingDog on 15 Apr 2008 09:36
In article
<2fb6d07b-8673-4787-b690-320c126018bd(a)8g2000hse.googlegroups.com>,
XR650L_Dave <spamTHISbrp(a)yahoo.com> wrote:

> I was a rotella diesel oil man myself, then they started added bad-for-
> wet-clutch friction modifiers to that, so I'm back to castrol 10w40.

WHAT???

You sure 'bout that? This is news to me.

--
Charles
'99 YZ250
From: XR650L_Dave on 15 Apr 2008 10:01
On Apr 15, 9:36 am, HardWorkingDog <har...(a)mush.man> wrote:
> In article
> <2fb6d07b-8673-4787-b690-320c12601...(a)8g2000hse.googlegroups.com>,
>
> XR650L_Dave <spamTHIS...(a)yahoo.com> wrote:
> > I was a rotella diesel oil man myself, then they started added bad-for-
> > wet-clutch friction modifiers to that, so I'm back to castrol 10w40.
>
> WHAT???
>
> You sure 'bout that? This is news to me.
>
> --
> Charles
> '99 YZ250


Heard it on the internet, it must be true.

Worse, heard it on thumpertalk.


Dave
From: JayC on 15 Apr 2008 12:17
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
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