I have a '00 Viggen with 30k that I've been changing every 3k with
> non-synthetic Castrol but I've been thinking of converting over to Mobil 1
> synthetic. What is a good oil change interval with a pure synthetic like > Mobile 1?
Whatever posessed you to use a non-synth oil at all ! I thought Saab says it's strictly 'verboten' ?
Graham