Engine Oil - Manual says 10W40 - Kawasaki KLR 650 Forum
2008+ KLR650 Wrenching & Mod Questions For repair, maintaining or modifying discussions related to the newly updated 2008 and beyond, Generation 2 KLR650 Motorcycle.

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post #1 of 24 Old 05-08-2012, 04:32 PM Thread Starter
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Engine Oil - Manual says 10W40

Hello, (note: posted this on KLR650.net as well...)

First post here, 1st KLR650 (2008).

The factory manual specifies 10W40 engine oil (API SE, SF, or SG; API SH, SJ, or SL with JASO MA) for my 2008, it seems many are using something heavier, e.g. 20W50. Question is why?

OEM lubrication enigneers spend time and money specifying the vicosities of the oils used these days and design engine components to be compatible, so why vary from the specified oil weight?

Thanks in advance!

It also says these things only make 20 HP @ 4,500 RPM, and 37 ft. lb. TQ @ 5,500 RPM. 20 HP? Really?

Last edited by redfoxco; 05-08-2012 at 04:36 PM.
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post #2 of 24 Old 05-08-2012, 04:48 PM
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Please provide bibliographic information (i.e., copyright date, edition, country, model and year, etc.) for your manual, redfoxco!

Here's what my '07 KLR650 Owner's Manual says about oil:



As you can see, 20W-50 viscosity is within recommendations.

Further, don't have my Service Manual handy, but . . . the horsepower and torque maximums you quote vary from what I've read.

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Regardless, you'll receive profound, knowledgeable comments from .net; world-renown lubrication experts abound there; one highly-placed management executive at .net once even managed a Jiffy-Lube-type establishment ('til he lost his job), I'm told.

Last edited by LoneRider; 05-08-2012 at 05:01 PM.
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post #3 of 24 Old 05-08-2012, 06:50 PM
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I'm running Rotella T 15w40 diesel motor oil and it seems great so far. The bike shifts way better aswell. If the engineers were so good they would have put a proper oil ring in the 2008 model so it would go through so much oil. Just saying..... But I heard alot of guys using this oil so I gave it a go. It's only been in the bike a few hundred km so far but no issues yet.


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post #4 of 24 Old 05-08-2012, 08:08 PM
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Being a new (2012) KLR owner, I'll go with what the manual says. I changed oils in my youth on my new Volkswagon and lost a main bearing at about 90k. I'll stick with the manufacturer's recommendations on oil viscosity, filter, and interval changes. I may go further and go synthetic after my maintenance agreement is over.
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post #5 of 24 Old 05-08-2012, 08:17 PM
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Quote:
Originally Posted by wrenrj1 View Post
Being a new (2012) KLR owner, I'll go with what the manual says. I changed oils in my youth on my new Volkswagon and lost a main bearing at about 90k. I'll stick with the manufacturer's recommendations on oil viscosity, filter, and interval changes. I may go further and go synthetic after my maintenance agreement is over.
Has any variation from manufacturer's recommendatins been mentioned on the thread so far, wrenrj1?

The factory-recommended oil change interval ('07 Owner's Manual, page 60) is: 6,000 miles (after 500 mile initial service); some KLR650 owners change the oil at shorter intervals . . .

Synthetic oil (of appropriate API service code and suggested viscosity) violates no factory recommendations, AFAIK.

Last edited by LoneRider; 05-08-2012 at 08:25 PM.
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post #6 of 24 Old 05-08-2012, 08:25 PM
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Quote:
Originally Posted by LoneRider View Post
Has any variation from manufacturer's recommendatins been mentioned on the thread so far, wrenrj1?

The factory-recommended oil change interval ('07 Owner's Manual, page 60) is: 6,000 miles (after 500 mile initial service); some KLR650 owners change the oil at shorter intervals . . .
Quoted from the OP in post #1: The factory manual specifies 10W40 engine oil (API SE, SF, or SG; API SH, SJ, or SL with JASO MA) for my 2008, it seems many are using something heavier, e.g. 20W50. Question is why?

Are we talking interval or oil viscosity? I was addressing oil viscosity based on the original post.

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post #7 of 24 Old 05-08-2012, 09:13 PM
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Wren, if you look closely at the copy of the factory manual page in Post # 2 on this thread, you'll see . . . my factory manual says 20W-50 is o.k.

You posted, " I'll stick with the manufacturer's recommendations on oil viscosity, filter, and interval changes." Thus, I mentioned the recommended INTERVAL is 6000 miles.

You posted, "I may go further and go synthetic after my maintenance agreement is over." Since synthetic oil violates no factory recommendation, why wait? Or have you pre-paid for non-synthetic oil changes?
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post #8 of 24 Old 05-08-2012, 09:27 PM
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Use Rotella so you can bum it off other KLR riders when you need it. And trust the Kawi Engineers? Who let an integral engine component remain unfixed for YEARS while the KLR community had to take it upon themselves to fix it? Really?

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post #9 of 24 Old 05-08-2012, 09:40 PM
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Well said Lockjaw!


Cheers, Nick
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post #10 of 24 Old 05-08-2012, 09:40 PM
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Quote:
Originally Posted by redfoxco View Post
Hello, (note: posted this on KLR650.net as well...)

First post here, 1st KLR650 (2008).

The factory manual specifies 10W40 engine oil (API SE, SF, or SG; API SH, SJ, or SL with JASO MA) for my 2008, it seems many are using something heavier, e.g. 20W50. Question is why?

OEM lubrication enigneers spend time and money specifying the vicosities of the oils used these days and design engine components to be compatible, so why vary from the specified oil weight?

Thanks in advance!

It also says these things only make 20 HP @ 4,500 RPM, and 37 ft. lb. TQ @ 5,500 RPM. 20 HP? Really?

Welcome... 1st post is about oil, this does not bode well for thee! (kidding sort of)

Oil viscosity relates to ambient temp, notice the chart that LoneRider posted. Rotella T 15-40 is a popular choice. it's readily available, JASO MA rated and comparably cheap (the most important consideration for a KLR rider!).

Oil polymers get sheared and the viscosity breaks down. The factory change intervals are far to long if you want to maintain viscosity. Here's a good resource to learn about oil: Bobistheoilguy Motorcycle forum

Horsepower... the KLR makes it's peak horsepower (34) at about 6500 RPM so yea at 4500 RPM it's making about 20, info here Patman's KLR dyno page

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