Fz1 which oil semi or fully

[daveclark]

What's best engine oil for gen2? I've had some fully synthetic given castrol power1 racing 10w-40.
Question is will it make the clutch slip?

Dave

[PaulSmith]

I just changed mine from own brand "high mileage" semi-synth to Castrol GTX 10-w40 semi-synth. I think that as long as you avoid anything that mentions fuel economy on the label, you should be fine.

[daveclark]

Cheers fella, not many get back to you on here?? Reading around its a bit vague on what you can get away with using, sounds like I may be better sticking to semi.

[brooker81]

Yeah i use Motul Semi Syth. Heard fully may increase slipping.

[DekF]

Castrol Power 1 Racing is one of the best oils there is on the market. It was designed for high performance motorcycle engines.
It's in my S1000r & it was used in Mr Brooker's FZ1 for nearly 30k miles until I changed to Halfords fully synthetic.

[NorthWestern]

It is odd how many people think fully synth causes clutch slip...


I used castrol power 1 in mine (and all my previous bikes), internals look perfect even after doing high mileage.  Currently use Silkolene/fuchs pro 4 fully synth in the gen1, perfect.

[daveclark]

Well after looking round there seems to be a debate but no one has ever had any slipping