• Engine oil

Posted: **Sat May 10, 2014 1:55 pm**

Haydn wrote:I use She'll advance ultra 4 fully synth in my track bike. I heard of the clutch slip rumour so I did a bit of research before and the shell stuff meets the JASO standard so it won't cause clutch slip. £32 including filter and wrench from Busters. Free delivery too.

Issue arrises from using non wet-clutch specific oils, most semi-synth / fully synth car oils have moly grease and other slipper aditivies in them to reduce engine-wear improve mpg but it causes a clutch that runs in oil to slip

Posted: **Sat May 10, 2014 8:58 pm**

How often can you wait between changes if you use fully synth?

Posted: **Sun May 11, 2014 8:20 pm**

Im not sure, I don't leave it in there any longer than i would a semi, just peace of mind that ive put the good stuff as the bike is at high rpm all the time. I know cars run long life fully synthetic, so it must last longer.

Engine oil

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