Rebuilt Windsor 289 V8 engine

I have a recently rebuilt Windsor 289 cubic inch V8 engine, but don't know what components were built into it. With modern rebuilds does the engine still require the valve lubricant to be added to the fuel? I have been adding it along with premium fuel just in case, would that do any harm long term if it wasn't necessary?

Answered by CarsGuide

23 February 2012

Graham Smith

If hardened valves and valve seats were fitted in the rebuild, you wouldn't need to use an additive, but it's probably unlikely that they were, so it would be best that you do use one. Adding it won't do any harm should it turn out that you do have hardened valve seats.

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