Quote:
Originally Posted by apple_fanta
i have just spent two days thouroughly cleaning my car and was wondering can u use wd40 as an after run oil?
thanks 
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In short no. Better off not using anything. Don't be so tight, after run oil is not expensive. Basically any rubber parts in the engine can and probably will adsorb WD40 and swell. Result, a lot of damage, seen it many times before.