93 Octane

getting knock all of a sudden

**Look at log 45** now that my hpfp situation is fixed, sometimes ill get knock ranging from -5 to -17 degrees if i put my foot down in a higher gear such as 4th for instance. odd that it happens after i put in lucas and i have dejavu like this happened the last time i put lucas in. could jus be bad gas or maybe it doesnt like the lucas? maybe plugs need to be looked at?