Unleaded or Premium?
I bought a 2nd hand 1996 CL LS sedan, 2.0 L engine.
The previous owner said i need to used regular unleaded petrol.
The vehicle specs shows regular unleaded for the 2.0 L model and premium unleaded for the 2.5 L.
I noticed the engine was "pinking" with regular unleaded so I filled Premium unleaded (98 octane). The engine sounded a lot happier and I noticed an improvement in performance. There was no improvement in fuel consumption.
I then tried 95 octane, there was no "pinking" and I suspect performance dropped a bit (could be my imagination though...).
A friend who is a mechanic told me 92 octane in NSW is real crap.
Any suggestions/thoughs? of course I want to use the right petrol but don't want to pay 15% extra for petrol if I don't have to.
Last edited by yud_focus; 06-25-2009 at 11:39 PM.