Will putting 10W 40 diesel oil in my bike ruin clutch

[hornetmike]

I'v'e changed the oil so many times because of fuel leaking into bore(which I think I have solved)was just going to use oil already in garage to go out for test ride, what the worst that can happen ?
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87 Honda CG 125 - 97 ER5 - SR 50 -81 Z250- 96 CBR 600 F- 94 GPX600R 88- GPX 400R- 87 GS 125 - 2006 Honda CB600F- 2003 ER5 - Honda CBF 1000 2009 - Honda CBR 600 RR 2011
Current BMW R1200GS 2010

[Bezzer]

Worst is slipping/contaminated clutch and using oil meant for a low revving diesel...... might not happen but who knows? and do you want the hassle/expense of new clutch plates and another oil change ?
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I used to be indecisive but now I'm not quite so sure.

[Pete.]

Won't hurt. I've been using it forever in my roadbikes.

Diesels might be low-revving but petrols don't have compression ratios in the high teens.
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a.k.a 'Geri'

132.9mph off and walked away. Gear is good, gear is good, gear is very very good

[stinkwheel]

It MIGHT make it start to sound noisy.

Diesel oil has a high detergent content.

If there is a lot of carbon gunking up the engine internals, the detergent can shift it through to the filter. This can result in the engine sounding much noisier.

It's not done any damage that wasn't there already, it just makes it noticeable.

This used to happen a lot when people pinched army oil to put in their old bangers. Army oil has a massive detergent content. They'd put it in and after the first hour of running, it'd come clattering back into the yard sounding like the knackered old heap it really was.

I've often thought it was more appropriate for a bike engine anyway, diesels give their oil a real hammering and it's formulated to match. Should cope better than normal oil being mashed through a clutch and gearbox.
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“Rule one: Always stick around for one more drink. That's when things happen. That's when you find out everything you want to know.”
I did the 2010 Round Britain Rally on my 350 Bullet. 89 landmarks, 3 months, 9,500 miles.

[woodyfjr]

The FJ owners have been running a Ring Free Diesel oil for years without any reported trouble to date.
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If you don't pay your exorcist you can get repossessed.

If you have to rev it! Don't Buy it!

[Kickstart]

Hi

I would think about using it. Detergent content would be my only real concern.

All the best

Keith
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Traxpics, track day and racing photographs - Bimota Forum - Bike performance / thrust graphs for choosing gearing

[serlant]

Have run Castrol GTX diesel in the XJ with no ill effects, sounded the same as castrol gtx for petrol engines probably near enough the same stuff.
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04 CBR1000RR, 1995 Husqvarna TE410, 1998 VTR1000(Sold), 1990 XJ600(sold), 1996 KH125(dead and sold)

[hornetmike]

Did it, and all is well at the moment
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87 Honda CG 125 - 97 ER5 - SR 50 -81 Z250- 96 CBR 600 F- 94 GPX600R 88- GPX 400R- 87 GS 125 - 2006 Honda CB600F- 2003 ER5 - Honda CBF 1000 2009 - Honda CBR 600 RR 2011
Current BMW R1200GS 2010

[weasley]

If it's truck oil then the whole detergent thing is applicable (in truth it is actually dispersants that are abundant rather than detergents), although still unlikely to cause any damage. If diesel car oil, don't worry.
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Yamaha XJ600 | Yamaha YZF600R Thundercat | KTM 990 SMT | BMW F900XR TE