30-06 Outdoors X-Fuel 325 Crossbow Rail Lube. And the X-Fuel 325 Crossbow String lube can be the difference between a great shot and a miss. The No. 325 is a premium rail lubricant that repels powder and other debris that can get caught in the string as it's slid across the rail. This lubricant will extend the life of your string and cables and will also eliminate wear and tear on the area directly above the string/blade center. With the felt applicator tip the X-Fuel 325 Crossbow String lubricant provides a quick neat and accurate application every time. The no. 325 is a premium rail lubricant developed to exceed the needs of today's high speed crossbows. Specifications for 30-06 Outdoors X-Fuel 325 Crossbow: Manufacturer: .30-06 Outdoors Color: Clear Package Contents: 30-06 Outdoors X-Fuel 325 Crossbow 30-06 Outdoors XF-1: X-Fuel 325 Crossbow Rail Lube