I'm a firm believer in Lucas products. I own a 1996 Peterbilt that I use to transport exotic and classic cars. As I look at the odometer it shows 1,539,305. I have overhauled the engine at 966,000. At every
oil change one gallon of Lucas went in. It's a ten gallon sump. Upon teardown we could find nothing
oil related showing excessive wear. I had lost a head gasket and figured with that mileage it would be cost effective to go through the engine. Over a half a million miles later there is no excessive
oil consumption. My diesel guru balanced and blueprinted the engine, put a custom turbo on (50 pounds boost) and a computer override that is adjustable for up to 800 horsepower. Torque is up around 2500 ft/lb. Hot rodding 15 liter diesels is almost as much fun as Fords. So when I change the oil in my Superformance about four ounces will go in. I run it in the truck's gearbox and two drive axles. I swear by it not at it.
Tom