Quote Originally Posted by Dr Terry View Post
98 is no cleaner than standard unleaded (91 RON), that's the power of media advertising at work. It has a higher RON, that's all.

BURD is correct about zinc though, older engines with flat tappet cams, don't like the lack of zinc in the oil.

Dr Terry
I worked for years at a local service station and we often had fuel samples taken and were given a report of the breakdown of the fuel.

The standard unleaded always showed a lot of additives, impurities, aromatics (yep, aromatics!), colouring, etc.... sometimes as many as to fill the page and go to a 2nd page. Also, the octane rating varied considerably.

The 98 always showed 3 things; one colour, one aromatic and the rest was petrol. And the octane rating was always spot-on.

I'm not someone that listens to media bullsh*t, but I DO believe what I see with my own eyes.