I drive a company vehicle with 210,000 miles on it. I have been putting lucas in the oil every change for the last 40,000 miles but recently a few days after having the oil changed we were on a trip a few hundred miles from home and we noticed an oil smell and smoke coming out of the rear of the truck. I stopped to check it and found the technican had used a filter wrench on the filter and it had a crack in it which was spraying oil every where. I checked the oil and it wasn't even showing on the stick. I was amazed because the oil pressure never even dropped. I refilled it (5 quarts) and drove it another 10 miles to an auto parts store where i purchased a filter, 5 quarts of oil and another quart of lucas.Ater putting these on the engine I fired it up with no rattles and full oil pressure and drove it home and it is till running fine 210,000 miles. I can't say enough to brag on your product. thanks