Don’t back away from HPL unless the cost is an issue. I don’t think you’ll find anyone here that would argue that even 5-8k HPL will still provide the best protection.Well I certainly appreciate the comments as this is what I was looking to hear. I’m slowly backing away from the HPL ledge now as everyone seems to agree that a 5K drain interval doesn’t justify the use of HPL. I guess that I may just drop back down to my old standby Schaffer which isnt a whole lot less expensive but has always been good to me. My Hemi 5.7 ran like a swiss clock on the 5w20.
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Best bet? Try it out. Use the oil Dave recommends for one 8k OCI & get a UOA to see how the oil held up. Then use whatever “backup” you’re considering. Pull an in-service UOA at 4-5k to see how the lesser oil is surviving. If it’s out of grade, and the HPL wasn’t, there’s your answer.
HPL likely isn’t more than 2x shelf oil + 2x filters, so then it’s merely a decision of if you want to cut your time under the car by half just to break even. In my book that’s still a win, because time ain’t free. Plus you’d cut your waste material in half as well
