Hi, I just bought an 88 Jag XJS V12. The car had been run but not driven in a few months. It idled rough at first but tightening the loose throttle linkage and cleaning and resetting intake leveled it out. The idle was still low and unless you press the throttle slowly there is a hesitation, sometimes it even stalls. The fuel pump and filter are new, so I checked those off the list. I pulled the plugs and the base rings had quite a bit of carbon on them and I planned on replacing them. I was also concerned about my injectors. The cost of a simple tune up like replacing spark plugs and injectors on a Jaguar V12 is astronomical compared to a $12 bottle of your "Deep Clean Fuel System Cleaner" so I got some.  This stuff really works! I put it in last night, ran the car for about 20min and again for about 10min today. I didn't even drive it yet, maybe hit 3,000 rpm a couple times. I pulled a  couple plugs tonight and you can already see where its cleaning carbon deposits off the base ring. I'm sure my injectors are loving it too! The idle is already closer to where it should be and the hesitation is less prominent. I'm confident it will only improve once I can drive it around. I've already recommended it to all my friends.

Thank you Lucas Oil for another great product!
Dave Fullington