What weight oil do you use?

Just went for mOT and tester suggested using 20W 50 instead of the 10W 40 I have been using (I think) as he said clutch was a bit heavy......so what do most people use?

What Cr*p!

10W40 for me.

10w40 bike oil.

Cheers for the replies, I thought I had the right stuff in there but he seemed to know what he was on about, what differenct would 20W 50 make?

[Viney]

10w40 also.

As for the clutch, change the clutch cable and/or grease up the worm drive

20W50 is basically a thicker oil. 20 being its viscosity at cold, 50 when warm...i think.

Dunno who uses 20w50 these days.

The engine is designed to run on the thinner oil. Would imagine that the thicker stuff would take longer to lubricate everything on the critical cold start up. Plus you might lose half a horsepower.

Just guessing though.

Where can you get bike oil? Halfords?

What about all the varying standards like synthetic and so on?

I'm so confused...

20w 50 is used on highly tuned cars as it can deal with ultra high temperatures, the down side being its a bit thick when cold. example the escort cosworth used that stuff out of the factory.

There is an oil man chap the frequents all the car forums, surprised he hasn't posted here yet, i will dig up one of his many informative posts, He sells oil mail order too btw.

Oh and Suzuki recommends 10w 40

EDIT - A little light reading for you http://www.imoc.co.uk/forums/viewtop...707&highlight=

Hein Gericke for oil but I think they have stopped doing the free air and oil filter with it.

Semi synthetic I believe as full may make the clutch slip.

Originally Posted by Bluesteel

Where can you get bike oil? Halfords?

What about all the varying standards like synthetic and so on?

I'm so confused...

Halfords sell it, like many others. Basically, never, ever, ever, ever put car oil in your bike. It's not good for a wet clutch, so don't do it. Ever. (got the point yet?)

Doesn't really matter about synth/semi-synth, but personally, I prefer semi-synth in the engine, mineral on the chain.