on High Pressure Air guns! If your tube doesn't say Silicone on it then don't use it. Pellgun oil is for CO2 not HPA and it's also not good to use on springers either cause it can cause diesling.
Here's a picture of Crosman's Silicone Oil:
if your tube doesn't say siliicone on it then DO NOT USE IT! Pellgun oil is petrolium based and from the heat that HPA can create it can ignite it and you can get seriously injured or die. Please do me a favor and research the do's and dont's with HPA (high pressure air). HPA can be very dangerous if you don't know what you are doing. I don't know if Ace Hardware sells it you'll have to check. You can order the Crosman Silicone Chamber oil from Crosman or you can order it on Amazon. ALSO if you have been using pellgun oil on that air gun of yours while you were using CO2 and your switching to HPA then you need to take it apart and clean the AS block assembly the transfer tube and your valve out so that there is no pellgun oil residue in them. Honestly it's a better idea to pull the whole gun apart and clean everything so that there is no chance of cross-contamination. If you don't you could have bomb in your hands if you stick your HPA tank on. Please avoid using HPA until you understand how dangerous it can be.