This one can treats engine sizes 1 6l 1 9l restore engine restorer is an engine repair not just an oil additive that works on the worn out areas of the cylinder walls restoring cylinder compression and improving it to nearly new condition before the next oil change engine restorer contains micro particles of a proprietary formula called csl 60 copper 40 lead plus silver trace in suspension in an sae 30 high performance motor oil the remetallizing compound csl was ori