Mixing oil ?

[David Stepney]

I change mine every 2500 miles. This was based on the recommendation for early VW Beetles with just a gauze filter of 3000 between oil changes, although I accept that air cooled engines are rather harder on their oil than water cooled ones. I use a good quality semi-synthetic 10/40. Not had any problems so far touch wood. Incidentally, my car’s handbook suggests that the engine oil should be changed ‘occasionally’ (whatever that means).