I used the Lucas fuel additive also. Usually just under $10 a bottle. It claims you can use it with regular gas on a vehicle requiring premium. Would like to know if this is true, but it seemed to be from me running 87 octane with my setup. I ran it on my mostly stock Regal GS at the time with short air intake, 180 tstat, and custom tune. It seemed to run good for about 6 months. This was during the time when gas was peaking $4.50 a gal and hardly anyone was buying premium so figured premium was loosing octane from sitting.Originally Posted by FastKatt
I had an issue, but I don't know if it was related where the engine would just randomly turn off, and I wouldn't be able to restart for about 10 minutes. I thought the injectors were clogging from the Lucas additive so I swapped them and did so other replacements. I cleaned the crank position sensor with brake clean and I don't recall it happening again after that, but the car didn't run much longer due to an unrelated issue so I only got about 2 weeks of testing done. Engine shutting off was happening almost daily so I thought it was the CPS. When disassembling the engine, the cylinder walls were smooth and there was no mechanical damage except bearings from a different issue and I didn't notice any knock when it ran.
