Post by
DevilMB3017 »
https://forums.nicoclub.com/devilmb3017-u47101.html
Mon Oct 06, 2008 5:51 pm
You might not be burning all your fuel when its high octane. It might be leaded gas too, which could be why its not be burning all the way.
Is there any gas in your oil now too? I'd check before driving too much.
Like 480SX said, find out more about it. Or just stick with pump.