The only word that discribes the Lucas products is mindblowing. About two years ago my wife's 2000 neon developed a knock when cold starting. I was working at a local auto parts. A coworker suggested your oil stablizer, BINGO!! the knock all but disapeared to a very light tapping. Thus her car is still going. On my 89 GTI 3 weeks ago the oil cooler seal gave up and the car was driven almost a mile. No oil showed on the dipstick (not a good thing.The tapppets started making a god awfull noise from the top side of the enging and the oil buzzer and light came on to alert me. After repairs and oil put back in the crankcase hoping for the best. A few of the tappets sounded bad to the point of a miss. I drained a quart of oil and added a bottle of the oil stabilizer. After all parts lubed up, the bad tapping went away, and the engine still runs without missing a beat and no smoking. Third, I've tried adout six octaine boosters to get the results I wanted with no real success or minor results. So, Just for grins I tried a bottle of the octane booster, and put about a 1/4 of a bottle in on a half a tank of gas. After driving around abit, the throttle started to get sensitive and I had to let up on the pedal, acceleration picked up. On a 10:1 comppression engine, octane is important to compresion. THIS STUFF WORKS!!!!!! NOW, it runs like a true vw 16 valve 1.8 . Keep up the real products and our autos will stay alive.