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My 2007 GMC Sierra 2500HD came from the factory with a magnet in the end of its oil drain plug. When the plug stripped on my 2001 GMC 2500HD I replaced it with a magnetic end one. In neither case do I feel it is making an engine changing effect, but, it's also doing no harm and may help keep...

Use to be Valvoline SynPower, as I use mostly Valvoline products, but I noticed a lot of leaking which made quite a mess. Just put in a tube of Lucas Oil X-Tra Heavy Duty, we'll see how this works.