Washing in petrol is not advised. I have a vivid memory of getting car paint all over my hands as a child. My dad being the the sensible parent used petrol to clean me. It smelled awful and dried my hands out so much that they aged 72 years that day. Haven't been the same since. So next time you see a child with old looking hands - remember they may have been bathed in petrol by a parent or guardian.
Hand moisturiser is an excellent gift for these people.