Fully synthetic or part synthetic?

[PieEater]

The difference between dino, semi and fully synthetic oil (other then price) is how long it takes to break down. If you are going to ride around the world without a service, or go 9 years between changes, then fully synth is the only choice. If you are going change the oil and filter every 2 years or 8000 miles (which ever comes first) then semi-synth is ideal for your needs. If you change every year or 5000 miles (which ever comes first), then dino is perfectly good for your needs. It is your bike, so it is your choice.

Remind me never to buy a bike from you  :eek