Originally Posted by sle39lvr
I wonder if this has any side-effects on your spark plugs?
What was your procedure to use this?
Pour it into your engine where you would normally put your oil.
Let it run for like 10mins and then flush it all out.
Worked fine for me, no damage to my spark plugs.
Try the fuel treatment additives from chevron also, that could help with the sluggish feeling.