Nathan, If the lifter was sticking then you could probably adjust the valve lash and the noise would go away but you would know it wasn't right because of how far down you would have to adjust. Most likley the lifter has lost it's hydraulic holding pressure and needs to be replaced. Not un common. I have been working on cars a long time and I would never put kerosine in an engine. It is a cutting agent and could do more dammage than good. Good HD oils today keep engines pretty clean.Oil filters,You can find many cross references for them, but be carefull, they can come apart on the inside under pressure and put paper inside the engine. Use a high quality filter from one of the De Lorean Dealers or I have the Slim Bosch filter for the car which won't interfer with the sending unit. Recommended 7 qts, 20-50 valvoline. John Hervey dherv10@xxxx www.specialTauto.com . --- In dmcnews@xxxxxxxxxxx, "Nathan E. Green" <gzen21@xxxx> wrote: > Hey, > I am planning to do an oil change and I have a few questions. I am sure > this has been covered before, so please bear with me. This is my first oil > change since aquiring the car ~2000 miles ago.(I can't tell as I have a > broken angle drive). Anyway, the owner said the oils had just been changed > and the oil still looks golden brown--however, I am desperately hoping to > get rid of a valve knock.