Check the listing for details. Rislone Engine Treatment. Condition: New. Listed at 8.50 USD. Rislone 4102 XTREME LUBE Maximum Performance Engine Treatment About this item:REDUCES FRICTION AND WEAR: Multi-grade formula allows the oil to flow freely and provides protection over a broader temperature rangeREMOVES AND PREVENTS SLUDGE: XTREME LUBE Maximum Performance removes sludge and other harmful deposits within engines that can alter tolerances, stick rings, cause noisy valves & lifters, and plug oil passages and screensQUIETS NOISY LIFTERS: The unique Rislone formula is designed to penetrate into bearing surfaces, piston rings and ring grooves, where sludge and varnish is likely to form. These deposits are gradually removed and held in suspension until they are trapped in the filter or removed with the next oil changeQUIETS NOISY VALVES: Regular use of Rislone Engine Treatment, with oil and filter changes at the proper intervals, will keep such deposits to a minimumDescription:Rislone Engine Treatment Concentrate.