When still under warranty doesn't the scheduled maintenance need to be done by an authorized dealer/shop to fulfill the warranty records requirement? Just askin'.
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It doesn't have to be done by a dealer as long as you use the approved type of oil and filters at the recommended intervals your warranty stays in play. The oil doesn't have to be BRP it just has to meet the requirements as listed in the owners manual.
You may need to show proof so you should keep a log with dated receipts. I have never had a dealer ask for proof (yet), but I have it if they do.