Oil change - will this cause issues?

[noggythenog]

Cheers Mike

yeh you've brought up another important point there.....my bike will be for hot sunny days only so I wont really need a low viscosity product and i'll probably stick with 10W40.

My van on the other hand will be a camper and my daily runner so it will be out all year round and down to circa -10 in extremes over here in the UK...so i'll need something that can cope with a greater range for it.....also it'll be doing plenty short journeys mixed with big trips...I wont always have the luxury of getting the engine up to temp before setting off in it....probably another need for low viscosity.

I also hadn't realised how much semi synth could degrade and I too like to get a few thousand out the bike before changing it.

I had read somewhere about not changing over from semi to fully if a motor has been run on one type for a long time but tbh I don't really buy into that and I reckon i'll go with some fully synth in both vehicles now.