Joe + Jason Olsem uses Lucas Heavy Duty Oil Stabilizer in 1984 Ford F-250 6.9 Dsl.

one day me and my dad (joe) were in o'reilly auto parts and saw this oil stabilizer so we bought 2 quarts b/c the pickup above always used (Burned) oil. today (3-24-08) we put it in and there was an immediate difference!!!!!!!

the engine has a scored piston beacause it got overheated and was ran on poor fuel a long time ago. so we went driving around and noticed that it ran quieter and smother no really loud rattle. it was windy and we were driving into the wind so the motor was working double time alot and the heat guage never went above the "o" on normal. fairly cool for that engine. the white smoke that is usually associated with the engine is burning oil is gone but the black smoke is still there b/c the injection pump was turned up 10% when it was overhauled but the power was increased and it fires right up when warm no need for glow plugs when its warm!!!!

very wonderful product!!! we will keep on buying it I might try to talk my dad into buying the fuel treatment too